Updating README with clearer install paths
Fix tag order

fixes #4151
- Properly re-add pre-existing tags to beginning of array
Adding size param to contrib images

no issue
- reduces filesize significantly, whilst not impacting quality
Fix cache-control header for API routes

closes #4157

- adds cache-control header back to api routes
- moves cache rules object into testUtils
- adds cache-control header test to every existing API test
Merge pull request #4153 from halfdan/4151-tag-order

Fix tag order
Merge pull request #4158 from ErisDS/issue-4157

Fix cache-control header for API routes
Merge pull request #4161 from ErisDS/readme

Updating README with clearer install paths
Merge pull request #4159 from ErisDS/about-image-fix

Adding size param to contrib images
Properly server shared files

refs #3992
- Don't use path.join for URLs
- Cache robots.txt for 1h instead of 1y