Reduce image size.
Checking the site with the PageSpeed extension, one of the reports was in reducing image size. This reduced the number of bytes by 67%. It was done with optipng -o7 -fix *.png in the app/assets/images dir. References: optipng: http://optipng.sourceforge.net/ PageSpeed extension: https://developers.google.com/speed/docs/insights/using_chrome
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![app/assets/images/bg-header.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/bg-header.png)
![app/assets/images/dark-scheme-preview.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/dark-scheme-preview.png)
![app/assets/images/file_txt.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/file_txt.png)
![app/assets/images/icon-search.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/icon-search.png)
![app/assets/images/images.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/images.png)
![app/assets/images/logo-black.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/logo-black.png)
![app/assets/images/logo-white.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/logo-white.png)
![app/assets/images/monokai-scheme-preview.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/monokai-scheme-preview.png)
![app/assets/images/no_avatar.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/no_avatar.png)
![app/assets/images/solarized-dark-scheme-preview.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/solarized-dark-scheme-preview.png)
![app/assets/images/switch_icon.png](https://lab.nexedi.cn/nexedi/gitlab-ce/-/raw/ee0e9830c1c1e4c54fd0b18fadef50f76c3680a4/app/assets/images/switch_icon.png)