docker-compose.yaml

version: "2"
services:
  nginx:
    restart: always
    build: ./nginx
    ports:
      - "8080:80"
    volumes:
      - /www/public
    volumes_from:
      - web
    links:
      - web:web
  web:
    build:
      context: .
      dockerfile: ./app/DockerFile
    depends_on:
      - mongo
    volumes:
      - ./:/app
    ports:
      - "32768:3000"
    environment:
      NODE_ENV: development
      PORT: 3000
    links:
      - mongo
  mongo:
    image: mongo:latest
    command: mongod --smallfiles --dbpath /data/db --nojournal --oplogSize 16 --noauth
    ports:
      - "27017:27017"
    volumes_from:
      - mongodata
  mongodata:
    image: tianon/true
    volumes:
      - /data/db

Dockerfile(nginx)

FROM nginx

# File Author / Maintainer
MAINTAINER Christian Rich

# Copy custom configuration file from the current directory
COPY nginx.conf /etc/nginx/nginx.conf

Dockerfile(web app)

FROM node:6.9.4

# Updates
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev libkrb5-dev

# Create app directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

RUN rm /etc/localtime && \
    ln -s /usr/share/zoneinfo/Australia/Sydney/etc/localtime

# Install app dependencies
COPY package.json /usr/src/app/
RUN npm install

# Bundle app source
COPY . /usr/src/app

EXPOSE 3000
CMD [ "npm", "start" ]

nginx.conf

worker_processes 4;

events {
    worker_connections 1024;
}

http {
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    server_tokens off;
    client_max_body_size 50M;
    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    gzip on;
    gzip_disable "msie6";
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;
    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

    upstream node-app {
		least_conn;
		server web:8080 weight=10 max_fails=3 fail_timeout=30s;
	}
	 
	server {
        listen 80;
        listen [::]:80;
		server_name example.org;
		charset utf-8;

        location /public {
            alias /src/app/build;
        }

        location / {
            proxy_pass http://web:3000;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
    }
}