Connect mongo and sapper server with docker

Question

I am working in a sapper / svelte project and I need to build the sapper project and connect it to a mongodb (I need to start mongo compose from docker-compose.yml)

At the moment I was trying to connect the db to the local mongo on port localhost: 27017 but it can't establish the connection. What should I do? Here there is my docker-compose

version: "3.4"

services:
  myapp:
    image: my_image
    deploy:
      update_config:
        delay: 30s
        parallelism: 1
        failure_action: rollback
    ports:
        - "3000:3000"

and here my dockerfile

FROM node:lts-alpine

WORKDIR /app

COPY static static
COPY emails emails

COPY package.json .
ENV NODE_ENV production
RUN npm install

COPY __sapper__/build __sapper__/build

EXPOSE 3000

CMD ["node", "__sapper__/build/index.js"]

Also what should I do to start the mongo deployment directly from compose? I have mongo on docker but I should start both directly from compose.

Answer 1

version: "3.4"

services:
  app:
    image: yourimage
    ports:
        - "3000:3000"
    environment: 
        - MONGODB_URL=mongodb://yourip/yourdb     
  mongodb:
    image: mongo
    restart: always
    ports:
      - "yourportsdb:yourportsdb"

it is not necessary to authenticate the mongo with password and user, eventually it passes the environments as suggested @Jihoon Yeo