add docker containerization

docker-compose.yml

@@ -0,0 +1,16 @@
+services:
+  web:
+    build: .
+    ports:
+      - "5000:5000"
+    volumes:
+      - ./instance:/app/instance
+    env_file:
+      - .env
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:5000/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s