simplify the dockerfile and move it to a separate file

docker-compose.yml

@@ -1,15 +1,7 @@
 services:
   dev:
-    build:
-      context: .
-      dockerfile_inline: |
-        FROM node:20-alpine
-        WORKDIR /usr/src/app
-        COPY package*.json ./
-        RUN npm install --include=dev
-        COPY . .
-        EXPOSE 4000
-        CMD ["npm", "run", "start:dev"]
+    build: .
+    command: npm run start:dev
     ports:
       - "4000:4000"
     env_file: .env