Added custom stop signal for database service

.env.example

@@ -17,6 +17,11 @@ GT_TAG=
 GT_CONTAINER_NAME=
 
 # Database
+# If using PostgreSQL is better to use SIGINT to power off the container which
+# enables the "Fast Shutdown" mode.
+# https://www.postgresql.org/docs/10/server-shutdown.html
+# https://github.com/docker-library/postgres/issues/184#issuecomment-394822161
 DB_IMG=
 DB_TAG=
 DB_CONTAINER_NAME=
+DB_STOP_SIG=SIGINT

docker-compose.yml

@@ -31,6 +31,7 @@ services:
     image: ${DB_IMG:-postgres}:${DB_TAG:-12.4}
     container_name: ${DB_CONTAINER_NAME:-gitea-db}
     restart: unless-stopped
+    stop_signal: ${DB_STOP_SIG:-SIGTERM}
     environment:
       - POSTGRES_USER=${DB_USER}
       - POSTGRES_PASSWORD=${DB_PASSWD}