Javascript – Docker – dist file disappeared after running docker-compose up -d

I have a nestJS application using Dockerfile to build

backend/Dockerfile

FROM node:18-alpine

# Reuse the old commits if dependencies are not changed
ADD package.json /tmp/package.json
RUN cd /tmp && npm install
RUN mkdir -p /app && cp -a /tmp/node_modules /app

WORKDIR /app
COPY . .

RUN npm run build // dist file is supposed to be generated in this step

CMD [ "npm", "run", "dev" ]

I use Docker Compose for bootstrap my entire applications
docker-compose.yml

version: '3.5'

services:
  backend:
    build: 
      context: ./backend
      dockerfile: Dockerfile
    container_name: backend
    ports: 
      - '3001:3001'
    volumes:
      - ./backend:/app
    depends_on:
      - database

  database:
    image: mongo:6.0
    container_name: mongodb
    restart: always
    ports:
      - '27017:27017'
    environment:
      MONGO_INITDB_ROOT_USERNAME: 'XXX'
      MONGO_INITDB_ROOT_PASSWORD: '1234'

However when I run docker-compose up -d, the dist file is not generated in the docker container. Below is the result of docker logs -f backend

> nest start --watch -b swc

>  SWC  Running...
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Bindings not found.
Failed to compile 20 files with swc.
Watching for file changes.
Error: Cannot find module '/app/dist/main'
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:1134:15)
    at Function.Module._load (node:internal/modules/cjs/loader:975:27)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:128:12)
    at node:internal/main/run_main_module:28:49

I tried to run npm run build locally to manually build a dist file to sync to the container, but whenever I run docker-compose up -d it just disappeared.

How to fix it?

Update 1
I tried to run docker exec -it backend sh, and run npm run build, a dist is created. However when I run npm run dev, the dist file disappeared and the exact error shown

package.json

  "scripts": {
    "build": "nest build",
    "dev": "nest start --watch -b swc",
    ...
  },