Use Hugo's Internal Template for Open Graph tags

[tanyabouman]

- Summary

Uses Hugo's internal template for Open Graph tags so that they are customized for each page.

Changes for each field:

• og:type was business.business, but that type is no longer listed on Open Graph Type documentation or Facebook's OpenGraph documentation
• og:title was "Kaldi | Great coffee with a conscience" for all pages. Now og:title is the title of each page.
• og:url was / for all pages. The Hugo template now automatically sets it to the link for the individual pages.
• og:image is still the same image across the entire site. There's now an option in the CMS to change it.

New field:

• og:description For pages that have a description field, this is used by the Internal Template for og:description. For now, that's only blog posts.

Possible future improvement:

• allow setting an image for each individual page and post. Maybe it's worth merging the main image field and the og:image field

- Test plan

Home page preview Products page preview Blog post preview

- Description for the changelog

Use Hugo's Internal Template for Open Graph tags

[martinjagodic]

@tanyabouman can you resolve conflicts, please?