Improve web performance on vets-website & vets-api

[asg5704]

Issue Description

This is a request to improve web performance on VA.gov by making the following improvements to reduce latency:

• Use Brotli as a primary compression algorithm with GZIP as a backup (14% smaller than GZIP).
• Work with External Service Provider teams (like eAuth/IAM) to investigate using compression (ie eAuth is serving up the full uncompressed resources like jQuery and jQuery UI).
• Work with IAM team to minify their common.js file & images.
• Resize/compress images and SVGs efficiently.

This document Latency within the Login-flow (using ID.me).pdf was my analysis on latency of resources during the ID.me login flow which consists of redirects between (VA.gov, ID.me, and eAuth).

Tasks

• [ ] Nginx is configured to use Brotli first with GZIP as a backup
• [ ] IAM team uses Brotli/GZIP compression, minifies any JS, purges any unused CSS
• [x] Appropriate cache policy for fonts and images on vets-website

Acceptance Criteria

• [x] Nginx is configured to use Brotli first with GZIP as a backup
• [ ] IAM team uses Brotli/GZIP compression, minifies any JS, purges any unused CSS
• [ ] Reduce size of images on vets-website
• [ ] Latency is reduced by systematic improvements

[cvalarida]

Any way you can convert that PDF file into something safer to consume? (I'm perhaps paranoid, but opening a PDF from a GH ticket makes me nervous.)

[asg5704]

@cvalarida Sure. Which format would you prefer?