Updated Docker setup

Dockerfile

+FROM node:18-alpine
+COPY package*.json ./
+RUN npm install
+COPY . .
+EXPOSE 3000
+CMD ["npm", "start"]
+

docker-compose.yml

+version: '3.8'
+
+services:
+  app:
+    build: .
+    container_name: quiz-app
+    ports:
+      - "3000:3000"
+    environment:
+      - DB_HOST=mysql
+      - DB_USER=root
+      - DB_PASS=Shaganaz@123
+      - DB_NAME=quiz_app
+      - JWT_SECRET=secretkey123
+      - JWT_EXPIRES_IN=1h
+    depends_on:
+      - mysql
+    networks:
+      - quiz-network
+
+  mysql:
+    image: mysql:8
+    container_name: quiz-mysql
+    environment:
+      MYSQL_ROOT_PASSWORD: Shaganaz@123
+      MYSQL_DATABASE: quiz_app
+    ports:
+      - "3306:3306"
+    networks:
+      - quiz-network
+
+networks:
+  quiz-network:
+    driver: bridge