Docker with Mongo and Express - docker

Question

First of all, give thanks for reading my question and try to help me and apologize for my English.
I'm trying to run a docker with a express server project and mongo, but build Dockerfile perfectly but I do:
docker logs -f name
and show next error:
/usr/local/bin/docker-entrypoint-sh line 340: exec: npm not found
And, I think that mongodb doesnt run
Why doesnt recognize npm if I add node?
How can run npm and launch mongo?
I'm using ubuntu 17.10
Here is my Dockerfile:
# Install Node
FROM node:latest
# Install Mongo
FROM mongo:4.0.0-xenial
# Author
MAINTAINER MachineGun
# Create user Ubuntu 17.10 (64 bits)
RUN adduser --disabled-login dockeruser
# Work Directory
WORKDIR /home/expressserver
# Copy express project to docker
COPY expressserver expressserver
# Defaul user
USER dockeruser
# Config cointainer PORT:
# MongoDB listening on port: 27017
# Server listening on port: 8080
EXPOSE 27017 8080
# Exec MongoDB
CMD [mongo]
# Exec server with custom npm start
CMD ["npm", "run", "start:dev"]
Also, in app.js I use mongoose with next uri: mongodb://localhost:27017/ExpressServer, its ok?
mongoose.connection.openUri('mongodb://localhost:27017/ExpressServer', { useNewUrlParser: true }, (err, res) => {
if (err) {
console.log('Error: Database not running on port 27017: \x1b[31m%s\x1b[0m', 'offline');
// console.log('throw err: ', err);
throw err;
}
console.log('Database running on port 27017: \x1b[32m%s\x1b[0m', 'online');
});

Answer 1

I've solved the problem :D
Thanks a lot :D
Finally I used docker compose...
Here is my docker-compose.yml:
version: '2'
services:
server:
container_name: expressserver
build: ./
ports:
- "8080:8080"
links:
- mongo
mongo:
container_name: mongoDB
image: mongo:latest
volumes:
- /var/lib/mongodb:/data/db
ports:
- "27017:27017"
command: mongod --port 27017
Here is my Dockerfile:
FROM node:carbon
MAINTAINER MachineGun
RUN adduser --disabled-login dockeruser
WORKDIR /home/dockeruser
COPY expressserver expressserver
WORKDIR /home/dockeruser/expressserver
RUN npm install
USER dockeruser
EXPOSE 8080 27017
CMD ["npm", "start"]
And in my app.js to connect with mongoose:
const options = {
autoIndex: false, // Don't build indexes
reconnectTries: 30, // Retry up to 30 times
reconnectInterval: 500, // Reconnect every 500ms
poolSize: 10, // Maintain up to 10 socket connections
// If not connected, return errors immediately rather than waiting for reconnect
bufferMaxEntries: 0
};
// Database connection
const connectWithRetry = () => {
mongoose.connect("mongodb://mongo/expressdb", options)
.then(()=>{
console.log('Database running on port 27017: \x1b[32m%s\x1b[0m', 'online')
})
.catch( (err) => {
console.log('MongoDB connection unsuccessful on port 27017: \x1b[31m%s\x1b[0m', 'offline');
console.log('Retry after 5 seconds.');
setTimeout(connectWithRetry, 5000)
});
}
connectWithRetry();