Fix content errors to pass HTMLproofer

We recently added HTMLproofer and it's identified a ton of things to clean up. Pulling those into this issue to chug through them. Please check off/comment when you implement one of the fixes!

To Do:

[x] - ./public/2014/03/28/plain-language-page-titles-more-important-than-ever/index.html
- 669:1: ERROR: Premature end of file Currently open tags: html, body, div, main, article, section, div, div, div, div, p, title.

^ (line 669)

669:1: ERROR: Premature end of file Currently open tags: html, body, div, main, article, section, div, div, div, div, p.

^ (line 669)

[x] - ./public/2014/04/01/digital-analytics-program-dap-oceans-of-data/index.html
- 310:79: ERROR: End tag contains attributes.

For more about DAP and how your agrency website can participate, visit .

                                                                          ^ (line 310)

310:79: ERROR: End tag ends with '/>', use '>'.

For more about DAP and how your agrency website can participate, visit .

                                                                          ^ (line 310)

310:88: ERROR: Unexpected '/' in tag.

For more about DAP and how your agrency website can participate, visit .

                                                                                   ^ (line 310)

[x] - ./public/2014/05/19/sign-up-for-digitalgov-citizen-services-summit-friday-may-30/index.html
- internally linking to /topics/code/data1/, which does not exist (line 0)
 
 <a href="/topics/code/data1/">data<a/>
[x] - ./public/2014/06/03/harnessing-the-power-of-many-digitalgov-summit-panels-recap/index.html
- internally linking to FIND?s=alison+lemon.md, which does not exist (line 0)
 
 <a href="FIND?s=alison+lemon.md">Knowledge Manager for the SocialGov Community<a/>
[x] - ./public/2014/09/12/digitalgov-gov-six-months-later/index.html
- internally linking to (/topics/metrics/), which does not exist (line 0)
 
 <a href="(/topics/metrics/)">metrics<a/>
[x] - ./public/2014/11/04/a-picture-is-worth-a-thousand-tokens-part-ii/index.html
- 399:25: ERROR: Invalid first character of tag name '\'.
 
 "post_tag": "<\/strong>"
```
 ^ (line 399)
```
[x] - ./public/2014/11/07/welcome-to-user-experience-month/index.html
- internally linking to /2014/07/07/user-experience-ux-vs-customer-experience-cx-whats-the-dif/ "User Experience (UX, which does not exist (line 0)
 
 <a href="/2014/07/07/user-experience-ux-vs-customer-experience-cx-whats-the-dif/ "User Experience (UX">Customer Experience<a/>
[x] - ./public/2014/12/23/challenges-round-up/index.html
- internally linking to /events/. For questions about Challenge.gov or the [Challenge & Prize Community of Practice](/communities/challenges-prizes/, which does not exist (line 0)
 
 <a href="/events/. For questions about Challenge.gov or the [Challenge & Prize Community of Practice](/communities/challenges-prizes/" title="Challenges & Prizes Community">Events Calendar<a/>
[x] - ./public/2015/02/24/digital-analytics-program-among-finalists-for-igniting-innovation-award/index.html
- internally linking to (/topics/metrics/), which does not exist (line 0)
 
 <a href="(/topics/metrics/)">articles<a/>
[x] - ./public/2015/03/12/the-new-fedramp-gov-is-here/index.html
- internally linking to info@fedramp.gov, which does not exist (line 0)
 
 <a href="info@fedramp.gov">FedRAMP email account<a/>
[x] - ./public/2015/03/19/turning-government-data-into-better-public-service/index.html
- 334:55: ERROR: End tag contains attributes.

Learn more about the Digital Analytics Program at:

                                                  ^ (line 334)

334:55: ERROR: End tag ends with '/>', use '>'.

Learn more about the Digital Analytics Program at:

                                                  ^ (line 334)

334:64: ERROR: Unexpected '/' in tag.

Learn more about the Digital Analytics Program at:

                                                           ^ (line 334)

[x] - ./public/2015/06/03/taking-the-pulse-of-the-federal-governments-web-presence/index.html
- linking to internal hash #part-4.md that does not exist (line 0)
 
 <a href="/guides/dap/common-questions-about-dap/#part-4.md">privacy controls<a/>
[x] - ./public/2015/09/02/https-and-other-ranking-factors-what-impacts-the-seo-of-government-websites/index.html
- 779:1: ERROR: Premature end of file Currently open tags: html, body, div, main, article, section, div, div, div, div, ul, h2, title.

^ (line 779)

779:1: ERROR: Premature end of file Currently open tags: html, body, div, main, article, section, div, div, div, div, ul, h2.

^ (line 779)

[x] - ./public/2015/09/10/day-100-the-great-federal-mobile-product-hunt/index.html
- 303:217: ERROR: Unexpected character (<) in attribute name.

A long time ago in a federal agency building far, far away on F Street… the `Great Federal Mobile Product Hunt ` DigitalGov Citizen Services Summit ` in Washington, DC. The campaign goal has not waivered from the initial launch because the `USA.gov Mobile Apps Directory ` remains incomplete. The Directory is the authoritative source for federal mobile Web products, and federal agencies that do not have their apps registered here are losing out on valuable promotional opportunities on `USA.gov ` and DigitalGov](/topics/thursday-mobile-products/). The hunt for the apps yet to be added to the Directory, henceforth labeled as #lostapps, is alive and well with the `National Oceanic and Atmospheric Administration (NOAA)` taking the lead at Day 100.

                                                                                                                                                                                                                    ^ (line 303)

[x] - ./public/2015/10/20/5-factors-for-building-a-successful-government-wide-digital-analytics-program/index.html
- linking to internal hash #part-7.md that does not exist (line 0)
 
 <a href="/guides/dap/common-questions-about-dap/#part-7.md">set of rules<a/>
[x] - ./public/2016/07/25/the-content-corner-quality-over-quantity-a-case-for-long-form-content/index.html
- internally linking to (/topics/metrics/), which does not exist (line 0)
 
 <a href="(/topics/metrics/)">website analytics<a/>
[x] - ./public/2016/07/29/whats-all-the-fuss-around-customer-experience/index.html
- linking to internal hash #Collaboration.md that does not exist (line 0)
 
 <a href="/resources/customer-experience-toolkit/#Collaboration.md">Collaboration<a/>
- linking to internal hash #Culture.md that does not exist (line 0)
 
 <a href="/resources/customer-experience-toolkit/#Culture.md">Culture<a/>
- linking to internal hash #Customer-Understanding.md that does not exist (line 0)
 
 <a href="/resources/customer-experience-toolkit/#Customer-Understanding.md">Customer Understanding<a/>
- linking to internal hash #Design.md that does not exist (line 0)
 
 <a href="/resources/customer-experience-toolkit/#Design.md">Design<a/>
- linking to internal hash #Digital-Services.md that does not exist (line 0)
 
 <a href="/resources/customer-experience-toolkit/#Digital-Services.md">Digital Services<a/>
- linking to internal hash #Governance.md that does not exist (line 0)
 
 <a href="/resources/customer-experience-toolkit/#Governance.md">Governance<a/>
- linking to internal hash #Measurement.md that does not exist (line 0)
 
 <a href="/resources/customer-experience-toolkit/#Measurement.md">Measurement<a/>
- linking to internal hash #Strategy.md that does not exist (line 0)
 
 <a href="/resources/customer-experience-toolkit/#Strategy.md">Strategy<a/>
[x] - ./public/2016/09/07/lets-encrypt-those-cnames-shall-we/index.html
- 384:19: ERROR: Unexpected '/' in tag.

ProxyPass `http://lets-encrypt.infr.search.usa.gov/.well-known/acme-challenge/` Require all granted

              ^ (line 384)

384:31: ERROR: Unexpected '/' in tag.

ProxyPass `http://lets-encrypt.infr.search.usa.gov/.well-known/acme-challenge/` Require all granted

                          ^ (line 384)

384:8: ERROR: Start tag of nonvoid HTML element ends with '/>', use '>'.

ProxyPass `http://lets-encrypt.infr.search.usa.gov/.well-known/acme-challenge/` Require all granted

   ^ (line 384)

[x] - ./public/2016/10/21/dear-search-reading-between-the-lines-of-search-data/index.html

internally linking to search@support.digitalgov.gov, which does not exist (line 0)

<a href="search@support.digitalgov.gov" target="_blank">email the DigitalGov Search team<a/>

[x] - ./public/2016/11/18/digging-deep-using-the-core-model/index.html

internally linking to (/topics/metrics/), which does not exist (line 0)

<a href="(/topics/metrics/)">metrics<a/>

[x] - ./public/2016/11/28/gsa-presents-grace-hopper-day-hackathon/index.html

internally linking to /topics/code/data1/, which does not exist (line 0)

<a href="/topics/code/data1/">data<a/>

[x] - ./public/2016/12/01/lessons-learned-evaluating-video-content/index.html

linking to internal hash #guidelines that does not exist (line 0)

<a href="/about/contribute/#guidelines">review our guidelines<a/>

[x] - ./public/2017/05/15/webinar-recap-measuring-your-mobile-users/index.html

internally linking to (/topics/metrics/), which does not exist (line 0)

<a href="(/topics/metrics/)">metrics<a/>

[x] - ./public/2017/05/22/how-facebook-live-increased-reach-and-engagement-of-scientific-lectures-at-nih/index.html

linking to internal hash #r1 that does not exist (line 0)

<a href="#r1">[1]<a/>

[x] - ./public/2017/06/21/the-data-briefing-the-arrival-of-generation-z-into-the-federal-government-and-generation-a/index.html

internally linking to william.brantley@uspto.gov?subject=The Data Briefing, which does not exist (line 0)

<a href="william.brantley@uspto.gov?subject=The Data Briefing">email<a/>

[x] - ./public/2017/09/11/cfpb-serves-up-financial-tips-to-seniors/index.html

linking to internal hash ### that does not exist (line 0)

<a href="###">Erin Scheithe<a/>

[ ] - ./public/2017/09/12/usa-gov-and-gobiernousa-gov-measure-content-efficiency-with-new-kpi-metric/index.html

image has a terrible filename (https://cdn2.hubspot.net/hubfs/532040/USAGov%20Blog/Screen%20Shot%202017-09-11%20at%204.09.38%20PM.png?t=1543344609193) (line 0)
[x] - ./public/2018/11/02/health-tech-sprint-aims-at-improving-care-access-experience/index.html
- internally linking to cto@hhs.gov, which does not exist (line 0)
 
 <a href="cto@hhs.gov">cto@hhs.gov<a/>
- internally linking to gil.alterovitz@pif.gov, which does not exist (line 0)
 
 <a href="gil.alterovitz@pif.gov">gil.alterovitz@pif.gov<a/>
- internally linking to justin.koufopoulos@pif.gov, which does not exist (line 0)
 
 <a href="justin.koufopoulos@pif.gov">justin.koufopoulos@pif.gov<a/>
[x] - ./public/404.html
- internally linking to /404.htmlindex.json, which does not exist (line 0)
[x] - ./public/authors/freddie-blicher/index.html
- internally linking to dap@support.digitalgov.gov, which does not exist (line 0)
 
 <a href="dap@support.digitalgov.gov">contact DAP via email<a/>
[x] - ./public/authors/freddie-blicher/page/2/index.html
- internally linking to dap@support.digitalgov.gov, which does not exist (line 0)
 
 <a href="dap@support.digitalgov.gov">contact DAP via email<a/>
[x] - ./public/authors/index.html
- internally linking to /authors/index.json, which does not exist (line 0)
[x] - ./public/authors/jeremyzilar/page/2/index.html
- internal image /logos/doi-revenuedata-logo.png does not exist (line 0)
- internal image /logos/doi-revenuedata-logo.png does not exist (line 0)
- internal image /logos/doi-revenuedata-logo.png does not exist (line 0)
[x] - ./public/event/2018/06/08/funding-future-technology-modernization-fund-proposal-workshop/index.html
- internally linking to EmergingTech@GSA.gov, which does not exist (line 0)
 
 <a href="EmergingTech@GSA.gov">EmergingTech@GSA.gov<a/>
[x] - ./public/event/2018/10/30/fedramps-resources-for-csps/index.html
- internally linking to info@fedramp.gov, which does not exist (line 0)
 
 <a href="info@fedramp.gov">info@fedramp.gov<a/>
[x] - ./public/event/2018/11/06/fedramps-resources-for-agencies/index.html
- internally linking to info@fedramp.gov, which does not exist (line 0)
 
 <a href="info@fedramp.gov">info@fedramp.gov<a/>
[x] - ./public/event/2018/11/14/fedramp-updates-3pao-requirements/index.html
- internally linking to info@fedramp.gov, which does not exist (line 0)
 
 <a href="info@fedramp.gov">info@fedramp.gov<a/>
[x] - ./public/event/2018/11/15/fedramps-resources-for-3paos/index.html
- internally linking to info@fedramp.gov, which does not exist (line 0)
 
 <a href="info@fedramp.gov">info@fedramp.gov<a/>
[x] - ./public/event/2019/05/23/dap-learning-series-using-analytics-usa-gov-api/index.html
- internally linking to analytics.usa.gov, which does not exist (line 0)
 
 <a href="analytics.usa.gov">analytics.usa.gov<a/>
[x] - ./public/event/2020/07/16/women-in-federal-it-cyber/index.html
- CIOC%20Website%20%20https://www.cio.gov/ is an invalid URL (line 0)
 
 <a href="CIOC%20Website%20%20https://www.cio.gov/">CIOC Website<a/>
[x] - ./public/guides/mobile-principles/optimize-minify-compression/index.html
- 409:23: ERROR: Invalid first character of tag name ' '.

# Disable for IE < 6 because there are some known problems

                  ^ (line 409)

[x] - ./public/news/page/10/index.html
- internal image /logos/doi-revenuedata-logo.png does not exist (line 0)
[x] - ./public/news/page/11/index.html
- internal image /logos/gov-uk-logo.png does not exist (line 0)
[x] - ./public/news/page/9/index.html
- internal image /logos/doi-revenuedata-logo.png does not exist (line 0)
- internal image /logos/doi-revenuedata-logo.png does not exist (line 0)
[x] - ./public/resources/agency-points-of-contact-for-federal-compatible-terms-of-service-agreements/index.html
- internally linking to digitalgov@gsa.gov, which does not exist (line 0)
 
 <a href="digitalgov@gsa.gov">the Digital.gov team<a/>
[x] - ./public/resources/checklist-of-requirements-for-federal-digital-services/index.html
- internally linking to /resources/

government-customer-service-policies-requirements-1993-to-present/, which does not exist (line 0)

 `<a href="/resources/

government-customer-service-policies-requirements-1993-to-present/">Government Customer Service Policies and Requirements`

[x] - ./public/resources/contact-center-guidelines/contact-center-technologies/index.html

internally linking to www.usa.gov/chat, which does not exist (line 0)

<a href="www.usa.gov/chat" title="Answers dot USA dot gov "Chat With Us" page">Answers.USA.gov<a/>

[x] - ./public/resources/customer-experience-toolkit/index.html

linking to internal hash #Collaboration that does not exist (line 0)

<a href="#Collaboration" title="Collaboration">Collaboration<a/>
linking to internal hash #Culture that does not exist (line 0)

<a href="#Culture" title="Culture">Culture<a/>
linking to internal hash #Customer-Understanding that does not exist (line 0)

<a href="#Customer-Understanding" title="Customer Understanding">Customer Understanding<a/>
linking to internal hash #Design that does not exist (line 0)

<a href="#Design" title="Design">Design<a/>
linking to internal hash #Digital-Services that does not exist (line 0)

<a href="#Digital-Services" title="Digital Services">Digital Services<a/>
linking to internal hash #Governance that does not exist (line 0)

<a href="#Governance" title="Governance">Governance<a/>
linking to internal hash #Measurement that does not exist (line 0)

<a href="#Measurement" title="Measurement">Measurement<a/>
linking to internal hash #Strategy that does not exist (line 0)

<a href="#Strategy" title="Strategy">Strategy<a/>

[x] - ./public/resources/how-to-get-your-open-data-on-data-gov/index.html

linking to internal hash #faq-data that does not exist (line 0)

<a href="#faq-data">Federal Data with Project Open Data<a/>
linking to internal hash #faq-general that does not exist (line 0)

<a href="#faq-general">General<a/>
linking to internal hash #faq-geospatial that does not exist (line 0)

<a href="#faq-geospatial">Federal Geospatial<a/>
linking to internal hash #faq-non-federal that does not exist (line 0)

<a href="#faq-non-federal">Non-federal<a/>

[x] - ./public/resources/improving-the-accessibility-of-social-media-in-government/index.html

linking to internal hash #accessibility that does not exist (line 0)

<a href="#accessibility">Why Is The Accessibility Of Social Media So Important?<a/>
linking to internal hash #developed that does not exist (line 0)

<a href="#developed">Who Developed This Toolkit?<a/>

[x] - ./public/resources/inventory-data-gov-guide/index.html

linking to internal hash #add-dataset that does not exist (line 0)

<a href="#add-dataset">Adding a Dataset<a/>
linking to internal hash #automating-data-json-downloads that does not exist (line 0)

<a href="#automating-data-json-downloads">Automating data.json downloads by agencies<a/>
linking to internal hash #creating-user-account that does not exist (line 0)

<a href="#creating-user-account">Creating a User Account<a/>
linking to internal hash #export-data-json that does not exist (line 0)

<a href="#export-data-json">Exporting Data.json<a/>
linking to internal hash #manage-datasets that does not exist (line 0)

<a href="#manage-datasets">Using inventory.data.gov to manage datasets<a/>
linking to internal hash #webinar that does not exist (line 0)

<a href="#webinar">Webinar on inventory.data.gov<a/>