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dockerdocker-composenestjs

Docker container is not updating on code change

EDITED.Resolved

So I created default nest.js project with nest new project command in terminal. In root folder I created files:

Dockerfile

# Base image
FROM node:18-alpine AS base

WORKDIR /app

COPY package*.json ./


FROM base AS dev

# Install app dependencies
RUN npm install

# Bundle app source
COPY . .
EXPOSE 4250
CMD [ "npm", "run", "start:dev" ]


FROM base AS prod

RUN npm install

COPY . .
RUN npm run build

CMD [ "npm", "run", "start:prod" ]

docker-compose.yml

version: '3.9'
services:
  app:
    build:
      context: .
      dockerfile: Dockerfile
      target: dev
    ports:
      - 4250:4250
    volumes:
      - ./src:/app/src

.dockerignore

node_modules
dist
.git
.env
docker.env

Then I ran command docker-compose up , and as a result in CLI I have messages: Starting compilation in watch mode

I can now test application with postman, or just open localhost:4250 in browser, yet on changes in code container does not rebuild. How to fix it?

PS. This is the most simplistic version of docker configs, I plan to build up / optimise on it, but first I need to fix problem with updates not been registered.

Solution

  • There is an unused block of code:

    FROM base AS dev

    # Install app dependencies
RUN npm install

# Bundle app source
COPY . .
EXPOSE 4250
CMD [ "npm", "run", "start:dev" ]

    coment it or do the build there and copy it to the next step.

    To rebuild the container do a docker-compose up --build