Fix/readme

[vpsx]

Description

At present, if someone follows the local dev setup instructions verbatim, the docker-compose file that actually gets run upon docker compose up is the one at the top level of this repo (not either of the docker-compose files in packages/server); that docker-compose file sets environment variables from .env.test, in particular the db username and password. Then upon running the prisma migrate step, there will be db auth errors if the environment variables in that shell are not also set according to .env.test.

I don't know what the intended steps are supposed to be (is the db actually supposed to be spun up from one of the other docker-compose files?) so this was just the quickest path to instructions that don't result in errors; just close this PR if not appropriate

Checklist

• [x ] This PR can be reviewed in under 30 minutes
• [x ] My code follows the style guidelines of this project
• [x ] I have performed a self-review of my own code
• [x ] I have commented my code, particularly in hard-to-understand areas
• [x ] I have made corresponding changes to the documentation
• [x ] I have assigned reviewers to this PR.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 886ad701	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (886ad70)	Report Missing	Report Missing	Report Missing
Head commit (3b67f53)	868	403	46.43%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#95)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩