chore: Add docker-compose for local PostgreSQL development

docker-compose.yml

@@ -0,0 +1,24 @@
+# docker-compose.yml
+
+version: "3.8"
+
+services:
+  postgres:
+    image: postgres:15-alpine
+    container_name: invoice_db
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER:-user}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-password}
+      POSTGRES_DB: ${POSTGRES_DB:-invoices_db}
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U user -d invoices_db"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  postgres_data: