feat: add Docker support with Dockerfile and docker-compose, update API URLs to use base_url

docker-compose.yml

@@ -0,0 +1,35 @@
+services:
+  db:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    ports:
+      - "${POSTGRES_PORT:-5432}:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      DATABASE_URL: postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB}
+    ports:
+      - "${PORT:-8080}:8080"
+    depends_on:
+      db:
+        condition: service_healthy
+
+volumes:
+  postgres_data: