add: postgresdb alternative

compose.yml

@@ -19,10 +19,6 @@ services:
       - GITEA_ALLOW_ONLY_EXTERNAL_REGISTRATION
       - GITEA_APP_NAME
       - GITEA_AUTO_WATCH_NEW_REPOS
-      - GITEA_DB_HOST="db:3306"
-      - GITEA_DB_NAME=gitea
-      - GITEA_DB_TYPE=mysql
-      - GITEA_DB_USER=gitea
       - GITEA_DISABLE_REGISTRATION
       - GITEA_DOMAIN=${DOMAIN}
       - GITEA_ENABLE_NOTIFY_MAIL
@@ -67,22 +63,6 @@ services:
         - "traefik.http.middlewares.${STACK_NAME}_cors.headers.addvaryheader=true"
         - coop-cloud.${STACK_NAME}.version=1.3.1+1.17.3-rootless
 
-  db:
-    image: "mariadb:10.9"
-    command: |
-      mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
-    environment:
-      - MYSQL_DATABASE=gitea
-      - MYSQL_USER=gitea
-      - MYSQL_PASSWORD_FILE=/run/secrets/db_password
-      - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/db_root_password
-    secrets:
-      - db_password
-      - db_root_password
-    volumes:
-      - "mariadb:/var/lib/mysql"
-    networks:
-      - internal
 
 networks:
   internal:
@@ -100,12 +80,6 @@ configs:
     template_driver: golang
 
 secrets:
-  db_password:
-    name: ${STACK_NAME}_db_password_${SECRET_DB_PASSWORD_VERSION}
-    external: true
-  db_root_password:
-    name: ${STACK_NAME}_db_root_password_${SECRET_DB_ROOT_PASSWORD_VERSION}
-    external: true
   internal_token:
     name: ${STACK_NAME}_internal_token_${SECRET_INTERNAL_TOKEN_VERSION}
     external: true
@@ -119,4 +93,3 @@ secrets:
 volumes:
   data:
   config:
-  mariadb: