feat: backup-db container hinzufügen

docker-compose.yml

@@ -26,7 +26,9 @@ services:
       - /etc/localtime:/etc/localtime:ro
     depends_on:
       - db
+
   db:
+    container_name: gitea-db
     image: postgres:17
     restart: unless-stopped
     environment:
@@ -37,3 +39,38 @@ services:
       - gitea
     volumes:
       - ./postgres:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD", "pg_isready", "-U", "gitea", "-d", "gitea"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  postgres-backup:
+    container_name: gitea-db-backup
+    networks:
+      - gitea
+    image: postgres:17
+    environment:
+      PGHOST: db
+      PGDATABASE: gitea
+      PGUSER: gitea
+      PGPASSWORD: giteaasdf
+      BACKUP_NUM_KEEP: 7
+      BACKUP_FREQUENCY: 1d
+    entrypoint: |
+      bash -c 'bash -s <<EOF
+      trap "break;exit" SIGHUP SIGINT SIGTERM
+      sleep 2m
+      while /bin/true; do
+        pg_dump -h $$PGHOST -U $$PGUSER -d $$PGDATABASE -Fc > /dump/pg_backup_\`date +%d-%m-%Y"_"%H_%M_%S\`.dump
+        (ls -t /dump/pg_backup_*.dump|head -n $$BACKUP_NUM_KEEP;ls /dump/pg_backup_*.dump)|sort|uniq -u|xargs rm -f -- 2>/dev/null || true
+        sleep $$BACKUP_FREQUENCY
+      done
+      EOF'
+    depends_on:
+      postgres:
+        condition: service_healthy
+    restart: unless-stopped
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+      - ./backup-db:/dump