feat(docker): add Docker Compose configuration for PostgreSQL service

docker/compose.yml

@@ -0,0 +1,23 @@
+volumes:
+  postgres:
+    driver: local
+
+services:
+  postgres:
+    image: docker.io/library/postgres:14
+    container_name: postgres
+    restart: always
+    environment:
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_DB=${POSTGRES_DB}
+    volumes:
+      - postgres:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: [ "CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}" ]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+      start_period: 5s