Add Docker and docker-compose support

.gitignore

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+node_modules/
+dist/
+.env
+*.log

Dockerfile

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+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm install
+
+COPY . .
+RUN npm run build
+
+EXPOSE 3001
+
+CMD ["node", "server.js"]

docker-compose.yml

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+version: '3.8'
+
+services:
+  meal-planner:
+    build: .
+    ports:
+      - "3001:3001"
+    volumes:
+      - ./data.json:/app/data.json
+    restart: unless-stopped