Dockerize -- WIP

[nimish]

Dockerizes the whole stack so it can be run simply. Updates Yii to 1.1.20 for PHP 7 support.
TBD:

• Update README to use new docker commands
• Fixup asset paths inside DB
• Set up CI runners with docker makefiles
• Set up docker registry to push images

[nimish]

@JunweiLiang worth you taking a look here -- this will hopefully lay the support to make quicker changes.

[JunweiLiang]

Thanks! I will take a look & test it by the end of next week.

[nimish]

So -- still work to be done here but I can hop on a video call whenever you're free to walk through it.

[nimish]

@JunweiLiang any blockers here? Was in hospital this week so not a lot moved, but would like to build off this.

[JunweiLiang]

Sorry, been busy with intern stuff. Give me three days so I could make sure the Yii and python updates don't break anything. Also, could you put the docker stuff into a folder? Thanks!

[nimish]

No problem -- will do.

[nimish]

Moved everything but the docker-compose.yaml (which really should live in the root) to docker dir. Working on a Makefile to create images.

[JunweiLiang]

Tested.

[nimish]

Awesome. @JunweiLiang looks like there's a merge conflict in the d/l setup script -- I combined the chmod inside it to save a step