Image optimization with ImageAlpha (png8+alpha) and ImageOptim.

[lowwebtech]

• Please check if the PR fulfills these requirements

• [x] The commit message follows our guidelines

• [ ] Tests for the changes have been added (for bug fixes/features)

• [ ] Docs have been added/updated (for bug fixes/features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

This PR is only for image optimization. PNG Images have been converted to png8 (with alpha preserved) with ImageAlpha and optimized with ImageOptim. It reduces images weight by 280kB.

• What is the current behavior? (You can also link to an open issue here)

Total images weight : 414kB

• What is the new behavior (if this is a feature change)?

Total images weight : 133kB

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

Only images are changed.

• Other information:

Hope it helps and thanks for your plugin !

[cuongdcdev]

@lowwebtech Thank you so much for your contribution, in case you find our plugin helpful, we would really appreciate it if you leave a positive review and rating here: https://wordpress.org/support/plugin/backwpup/reviews/#new-post Thank you so much and have a great weekend!