chore: use image from forgejo container registry

README.md

@@ -1,2 +1,40 @@
 # backend
 
+You can run and test the latest backend by using the docker image based on main
+
+## docker compose file
+```yml
+version: '3.5'
+volumes:
+  gorb-backend:
+  gorb-database:
+networks:
+  gorb:
+services:
+  backend:
+    image: git.gorb.app/gorb/backend:main
+    restart: always
+    ports:
+      - 8080:8080
+    networks:
+      - gorb
+    volumes:
+      - gorb-backend:/gorb
+    environment:
+      - DATABASE_USERNAME=gorb
+      - DATABASE_PASSWORD=gorb
+      - DATABASE=gorb
+      - DATABASE_HOST=database
+      - DATABASE_PORT=5432
+  database:
+    image: postgres:16
+    restart: always
+    networks:
+      - gorb
+    volumes:
+      - gorb-database:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_USER=gorb
+      - POSTGRES_PASSWORD=gorb
+      - POSTGRES_DB=gorb
+```