Add Docker improvements and containerization

docker-compose.yml

@@ -2,11 +2,21 @@ version: "3.9"
 
 services:
   spelling-app:
-    build: .
+    build: 
+      context: .
+      dockerfile: Dockerfile
+    image: ghcr.io/nmemmert/spelling:1.1.0
     container_name: spelling-app
     ports:
       - "3000:3000"
     volumes:
-      - ./public/users.json:/app/public/users.json
-      - ./public/wordlists.json:/app/public/wordlists.json
+      - ./data:/app/data
+    environment:
+      - NODE_ENV=production
     restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "node", "-e", "require('http').get('http://localhost:3000', res => res.statusCode === 200 ? process.exit(0) : process.exit(1))"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s