How should I dockerize and deploy a NestJS monorepo project? - docker

Question

I have NestJS monorepo project with structure as below:
...
apps
app1
app2
app3
...
If I got an idea correctly, I have possibility to run all the applications in same time, i.e. I run command and have access to apps by paths like http://my.domain/app1/, http://my.domain/app2/, http://my.domain/app3/ or in some similar way. And I need to put all apps in a docker container(s) and run them from there.
I haven't found something about this proceess. Did I undestand the idea correctly and where could I know more about deployment NestJS monorepo project?

Answer 1

This is how I solved it:
apps
app1
Dockerfile
...
app2
Dockerfile
...
app3
Dockerfile
...
docker-compose.yml
Each Dockerfile does the same:
FROM node:16.15.0-alpine3.15 AS development
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build
FROM node:16.15.0-alpine3.15 AS production
ARG NODE_ENV=production
ENV NODE_ENV=${NODE_ENV}
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install --only=production --omit=dev
COPY --from=development /usr/src/app/dist ./dist
CMD ["npm", "run", "start-app1:prod"]
Where the last line should start the application so adjust that to your project naming.
Later you should build each of the images in your CI/CD pipeline and deploy them separately. To run the docker build from the root folder of the project you just need to provide a Dockerfile path for -f parameter, for example:
docker build -f apps/app1/Dockerfile -t app1:version1 .
docker build -f apps/app2/Dockerfile -t app2:version1 .
docker build -f apps/app3/Dockerfile -t app3:version1 .
To run it locally for tests, utilize docker-compose.yml
version: '3.8'
services:
app1:
image: app1:version1
ports:
- 3000:3000 # set according to your project setup
app2:
...
app3:
...
And start it by calling docker compose up