nginx angular 5 reverse-proxy mongo image - mongodb

Question

I been able to get the reverse proxy working for my angular 5 project. With below files. I am very new to Angular and nginx. Before I dockerized the client and nginx etc. I just installed everything under one path.
So I just ran one npm install and I worked with npm start, ng build --prod and ng serve.
I am just a bit confused about Angular 2 version 5, I thought I was trying to separate the client from the server. Knowing that Angular 2 runs most things client side. However right now it looks like my app.js is still being called from within the same 'client' container.
Am I supposed to separate and containerize the express server and what are the benefits of doing this?
I am also going to run mongo image from a container. Am I correct in linking the Client container to mongo?
nginx default.conf
server {
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://client:4200/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
}
docker-compose.yml
version: '2'
services:
# Build the container using the client Dockerfile
client:
build: ./
# This line maps the contents of the client folder into the container.
volumes:
- ./:/usr/src/app
links:
- mongo
depends_on:
- mongo
mongo:
image: mongo
container_name: "mongodb"
environment:
- MONGO_DATA_DIR=/data/db
- MONGO_LOG_DIR=/dev/null
volumes:
- ./data/db:/data/db
ports:
- 27017:27017
command: mongod --smallfiles --logpath=/dev/null # --quiet
# Build the container using the nginx Dockerfile
nginx:
build: ./nginx
# Map Nginx port 80 to the local machine's port 80
ports:
- "80:80"
# Link the client container so that Nginx will have access to it
links:
- client
Dockerfile
# Create a new image from the base nodejs 7 image.
FROM node:8.1.4-alpine as builder
# Create the target directory in the imahge
RUN mkdir -p /usr/src/app
# Set the created directory as the working directory
WORKDIR /usr/src/app
# Copy the package.json inside the working directory
COPY package.json /usr/src/app
# Install required dependencies
RUN npm install
# Copy the client application source files. You can use .dockerignore
to exlcude files. Works just as .gitignore does.
COPY . /usr/src/app
# Open port 4200. This is the port that our development server uses
EXPOSE 3000
# Start the application. This is the same as running ng serve.
CMD ["npm", "start"]

Answer 1

Even though you are running your client (angular) and server (node) in the same container, they are still "separate". They are physically located & served on the same server, but run separately. Your api layer runs on node and your angular application runs on the client.
What you have is valid. I have pretty much the same setup. I have 2 containers. A node container that runs express to serve my api layer and my angular application. Then I have the mongo container as the db.