test(ci): update ci config

[seaerchin]

Problem

Previously, our ci configuration was not working due to a few issues. These are respectively:

1. requiring docker containers to be setup prior to running tests (for integration testing)
2. source command not existing in github runner shell
3. jest not automatically exiting

Solution

In order, the fixes are as follows:

1. run npm run dev:services command
2. change source to .
3. This is more interesting and more detail will be provided - i think this issue covers it up pretty well and i adopted their solution. Basically all the tests pass but jest wasn't exiting and resulted in an indefinite wait. This problem is due to sequelize having a connection pool and the teardown script doesn't close all the connections, merely one connection. To fix this, there's another script that's ran after every test suite and this script closes sequelize connections. Oddly enough, setting DB_MAX_POOL = 1 in the env vars don't work for this

[alexanderleegs]

lgtm, thanks for investigating this!!