Добавил примеры

docker-compose.example.yml

@@ -0,0 +1,22 @@
+services:
+  api:
+    build: .
+    ports:
+      - "5000:8080"
+    depends_on:
+      - db
+    environment:
+      ConnectionStrings__DefaultConnection: Host=db;Database=${POSTGRES_DB};Username=${POSTGRES_USER};Password=${POSTGRES_PASSWORD}
+
+  db:
+    image: postgres:17
+    restart: always
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    volumes:
+      - pg_data:/var/lib/postgresql/data
+
+volumes:
+  pg_data: