feat(docker): add docker via Circle CI

[vladikoff]

@jbuck could you please add the build creds to https://circleci.com/gh/mozilla/fxa-auth-db-mysql/edit#env-vars ?

[jbuck]

@vladikoff added creds, thanks for the reminder!

[seanmonstar]

Ah, just tried to push my own branch and enable circle, saw it was already enabled!

Only thing I see here is that since removing the old Dockerfile, the README instructions on using it are incorrect.

[vladikoff]

@jbuck so for tests to pass we will need a local mysql running I think. Should we use a docker container or something else?

[jbuck]

@vladikoff Circle says they have MySQL running locally by default, so all you should need to do is add --net="host" to the docker run command so that the container can connect to it.

[vladikoff]

@vladikoff Circle says they have MySQL running locally by default, so all you should need to do is add --net="host" to the docker run command so that the container can connect to it.

Sounds good! I'll just need to make sure it is MySql 5.6