Add production Docker Compose configuration

.gitignore

@@ -21,3 +21,4 @@ frontend/playwright-report/
 # Docker / logs
 *.log
 docker-data/
+.env.production

docker-compose.prod.yml

@@ -0,0 +1,38 @@
+services:
+  db:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB:-polskalokalnie}
+      POSTGRES_USER: ${POSTGRES_USER:-polskalokalnie}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-polskalokalnie_dev}
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-polskalokalnie} -d ${POSTGRES_DB:-polskalokalnie}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  backend:
+    build:
+      context: ./backend
+    environment:
+      SPRING_DATASOURCE_URL: jdbc:postgresql://db:5432/${POSTGRES_DB:-polskalokalnie}
+      SPRING_DATASOURCE_USERNAME: ${POSTGRES_USER:-polskalokalnie}
+      SPRING_DATASOURCE_PASSWORD: ${POSTGRES_PASSWORD:-polskalokalnie_dev}
+      SPRING_JPA_HIBERNATE_DDL_AUTO: ${SPRING_JPA_HIBERNATE_DDL_AUTO:-update}
+    depends_on:
+      db:
+        condition: service_healthy
+
+  web:
+    build:
+      context: .
+      dockerfile: nginx/Dockerfile
+    depends_on:
+      - backend
+    ports:
+      - "127.0.0.1:8082:80"
+
+volumes:
+  postgres-data: