feat: add dedicated postgres:16-alpine database service for Forgejo

infrastructure/docker/docker-compose.forgejo.yml

@@ -10,15 +10,43 @@ networks:
 volumes:
   forgejo_data:
     driver: local
+  forgejo_db_data:
+    driver: local
 
 services:
+  forgejo-db:
+    image: postgres:16-alpine
+    container_name: forgejo-db
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: ${FORGEJO_DB_NAME:-forgejo}
+      POSTGRES_USER: ${FORGEJO_DB_USER:-forgejo}
+      POSTGRES_PASSWORD: ${FORGEJO_DB_PASS:-forgejo_secure_pass_2026}
+    volumes:
+      - forgejo_db_data:/var/lib/postgresql/data
+    networks:
+      - forgejo_internal
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${FORGEJO_DB_USER:-forgejo} -d ${FORGEJO_DB_NAME:-forgejo}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
   forgejo:
     image: codeberg.org/forgejo/forgejo:9.0-rootless
     container_name: forgejo
     restart: unless-stopped
+    depends_on:
+      forgejo-db:
+        condition: service_healthy
     environment:
       - USER_UID=1000
       - USER_GID=1000
+      - FORGEJO__database__DB_TYPE=postgres
+      - FORGEJO__database__HOST=forgejo-db:5432
+      - FORGEJO__database__NAME=${FORGEJO_DB_NAME:-forgejo}
+      - FORGEJO__database__USER=${FORGEJO_DB_USER:-forgejo}
+      - FORGEJO__database__PASSWD=${FORGEJO_DB_PASS:-forgejo_secure_pass_2026}
       - FORGEJO__server__DOMAIN=git.thecr3wnet.com
       - FORGEJO__server__ROOT_URL=https://git.thecr3wnet.com/
       - FORGEJO__server__HTTP_PORT=3000
@@ -34,4 +62,3 @@ services:
       interval: 15s
       timeout: 5s
       retries: 3
-