Added Docker

Dockerfile

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+FROM node:20-alpine
+
+RUN apk add curl
+
+WORKDIR /app
+
+COPY package.json .
+
+RUN npm install
+
+COPY . .
+
+RUN npm run build
+
+CMD [ "npm", "run", "start" ]

docker-compose.yml

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+
+version: '3.8'
+services:
+  backend:
+    build:
+      context: .
+      dockerfile: ./Dockerfile
+    environment:
+      - NEXT_PUBLIC_MEDUSA_BACKEND_URL=http://backend:9000
+      - NEXT_PUBLIC_BASE_URL=http://localhost:8000
+      - POSTGRES_URL=postgres://postgres:123456@postgres/medusa-TBcY
+    restart: always
+    ports:
+      - 8000:8000
+    networks:
+      - medusa
+
+networks:
+  medusa:
+    external: true