Fix docker build

[davoclavo]

Fix Dockerfile

Currently the Dockerfile is broken due to changes to the install scripts. The Dockerfile now mostly relies on scripts/install_dev, and due to its dependency on resin's raspbian image, a couple of bits had to be modified.

• Create gpio group
• Give the user pi access to video group
• Changed virtualenv to be installed via pip

I think relying on scripts/install_dev is not the best way to solve this, but it works in the interim, and it keeps the docker and non-docker builds rely on the same installation script. The reason why I say is not the best solution is that then docker can't leverage caching builds between commands, so every time a change is made in script/install_dev, the whole step has to be re-built, which takes a long time. Also, changes to other files that install_dev relies on (like init_dev) probably won't be picked up in order to expire the cache, so could potentially cause troubles while debugging docker builds.

Move couchdb related stuff out of scripts/init_dev

• Compaction setting to db_bootstrap/db_config.py
• Installation of couchdb to its own scripts/install_db script.

Add docker-compose.yml

This file originally lived at the openag_brain_docker_rpi repo, but probably was lost in the transition to the monorepo. I think it is super useful to have it, and it is still mentioned a couple times in the docs.

NOTE - The docker image in docker hub should be updated by one of the admins in order for docker-compose to build from it.

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Testing

In order to test, make sure you have installed docker and docker-compose

./openag_brain/scripts/install_docker

Then build the containers and start the application - This step will take a while, and you should be able to see progress in the logs.

docker-compose up -d

Docker cheatsheet

[rbaynes]

I'm setting up a clean raspbian SD card to test that this:

• doesn't mess up the developer build
• creates a docker instance that runa

[rbaynes]

@Spaghet please re-review. I made a few minor changes to make this work for the developer install. (I'm still testing docker). https://github.com/OpenAgInitiative/openag_brain/pull/338/commits/700efeed70bc13219bfbc9b5623efde1172bed72