Following the README steps does not install pip dependencies before running a test

[kereliuk]

If we follow the README top down, not all the python dependencies get installed. For example, requests.

If I ensure I have wptd-dev running and run

docker exec -it -u $(id -u $USER):$(id -g $USER) wptd-dev-instance \
    run/run.py firefox-56.0-linux --path battery-status

requests is not installed.

Maybe we need to run the Makefile while setting up the dev container

[Hexcles]

cc @lukebjerring as he mentioned seeing some errors when setting up the new docker dev environment. Not sure if it's the same issue.

[kereliuk]

I can run

docker exec -it -u $(id -u $USER):$(id -g $USER) wptd-dev-instance make py_deps

And a lot of stuff fails to build because of "error: invalid command 'bdist_wheel'; however, requests does install :)