chore: docker compose improvements

[mfiedorowicz]

• move docker-compose.yaml and sample.env into root of the repo
• docker-compose.yaml cleanup

[github-actions[bot]]

Go test coverage	STATUS	ELAPSED	PACKAGE	COVER	PASS	FAIL	SKIP
🟢 PASS	0.01s	github.com/netboxlabs/diode/diode-server/ingester	0.0%	0	0	0
🟢 PASS	0.02s	github.com/netboxlabs/diode/diode-server/netbox	0.0%	0	0	0
🟢 PASS	1.04s	github.com/netboxlabs/diode/diode-server/netboxdiodeplugin	7.9%	16	0	0
🟢 PASS	1.05s	github.com/netboxlabs/diode/diode-server/reconciler	1.2%	1	0	0
🟢 PASS	1.33s	github.com/netboxlabs/diode/diode-server/reconciler/changeset	81.7%	58	0	0
🟢 PASS	1.02s	github.com/netboxlabs/diode/diode-server/server	81.6%	14	0	0
🟢 PASS	1.01s	github.com/netboxlabs/diode/diode-server/version	100.0%	1	0	0

Total coverage: 71.2%

[orb-ci]

:tada: This issue has been resolved in version 0.2.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket:

[orb-ci]

:tada: This issue has been resolved in version 0.2.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: