* feat: add postgres to docker compose * feat: run migrations via entrypoint * chore: tidy .env.example * fix: allow empty strings for optional envs * fix: remove external from kan-network * chore: update readme
* feat: add postgres to docker compose * feat: run migrations via entrypoint * chore: tidy .env.example * fix: allow empty strings for optional envs * fix: remove external from kan-network * chore: update readme