Compress field images with oxipng

[Gold856]

I used oxipng with the arguments -Z -o max --fast to compress each image, then a second pass with -o max --fast --strip safe to squeeze a few more bytes out. This reduced the size of the field images by ~50%, and reduced the size of the whole app by ~25%.

[Gold872]

I think this is a good improvement to add. I'd prefer adding this as a GitHub CI action so it doesn't have to be done manually when new images are added

[Gold856]

The CI workflow has been added as a comment command /optimize. You'll need to add a sercet called IMAGE_COMPRESSOR_TOKEN that has push access to allow GitHub Actions to commit and push to PR branches.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.94%. Comparing base (f0c2bf5) to head (65081bb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #103   +/-   ##
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  Coverage   63.94%   63.94%           
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  Files          77       77           
  Lines        7983     7983           
=======================================
  Hits         5105     5105           
  Misses       2878     2878           

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[Gold872]

What I was originally thinking for the CI is for it to compress the images before building, that way it's done automatically without any need for comment commands or github tokens. This way works too but I'd prefer making the compression an internal step before the CI build.

[Gold856]

We’d need a token anyways to be able to push commits and I’m not a big fan of adding commits to a PR automatically. The compression process also takes several minutes (20+ per image), and I don’t want to hold up a build just for that. I think just running an optimize command every time a PNG is modified/added is a good compromise (I doubt PNGs are modified/added often anyways).

[Gold872]

Since it takes that long to optimize the images I think it's best to just remove the CI do the compression manually. You're right that there's only a new image once a year, and now that I think of it, trying to simplify it ends up creating more work.

I appreciate your work on this I think this is a good enhancement