Health check

Use this to verify the service is up before a deploy or from a monitoring tool.

curl https://forms.devxgroup.io/api/v1/health
# { "ok": true, "version": "0.1.0", "db": "ok", "t": 1234567890 }

Returns 200 when the DB is reachable. Returns 503 if the DB ping fails. The t field is a Unix timestamp in milliseconds.