Reduce Docker image size

[ngosang]

Wallabag Docker image size uncompressed is 574 MB
According to dive the image can be reduced at least in 100 MB.

I have some ideas but I'm not expert in php/composer:

• Why do you install Python and Python libraries? It takes ~188MB
• Remove /root/composer/ I think this is the composer cache ~43 MB
• Remove .git folder (repository history) in the final image. I think it will be wise to remove all but the php source code and config.
• Is it possible to uninstall composer and other dependencies after the installation is complete? (I think you only need php, php-libs and nginx)
• Vendor folder is ~104MB. Are all dependencies required?

Update: If you don't agree, another alternative is to publish 2 images (with different tags). I think the slim image could be 1/3 the size of the current image with the same features (redis). Some of us are running Wallabag in RaspberryPi with low resources. :)

[Kdecherf]

Hello @ngosang,

You should definitely take a look at #256 :)

[ngosang]

Thank you, I will.
Just for reference. This app uses same technologies Php+Mysql and the image is just 50MB uncompressed / 20MB compressed:
https://hub.docker.com/r/kanboard/kanboard/
https://github.com/kanboard/kanboard/blob/master/Dockerfile

[Kdecherf]

Well it's not relevant to compare these two projects as they don't have the same amount of dependencies nor features.