lossless image optimization

What does this MR do?

optimize images

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

https://developers.google.com/speed/pagespeed/insights/?url=https%3A%2F%2Fgitlab.com%2Fusers%2Fsign_in&tab=desktop

Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

Merge request reports

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