feat: allow custom host authentication method

docker-compose/postgres/docker-compose.yaml

@@ -6,6 +6,7 @@ services:
     image: docker.io/library/postgres:16.2
     environment:
       - POSTGRES_INITDB_ARGS=${POSTGRES_INITDB_ARGS---data-checksums}
+      - POSTGRES_HOST_AUTH_METHOD=${POSTGRES_HOST_AUTH_METHOD-}
       - POSTGRES_USER=${POSTGRES_USER}
       - POSTGRES_PASSWORD_FILE=/run/secrets/postgres_password
       # (Optional) when creating a new database