Nginx를 프록시 서버(Ubuntu)로 사용하여 Docker로 NodeJS Restful 애플리케이션 배포

"scripts": {
"start": "node <mainfile>"
}

# obtain the node image
FROM node
# change to the working directory
WORKDIR <directory_name>
#move the package file to the current working directory
COPY package*.json ./
# install the depedencies
RUN npm install
COPY . .
# run the app
CMD [ "node", <mainfile> ]

http {
 upstream backend {
   server <environment_name: port>
 }
 server {
  location / {
    proxy_pass http://backend;
  } 
 }
}

versions: '3',
services:
  nginx_server:
    image: nginx #image of the nginx
    volumes: 
     - './nginx/default.conf:/etc/nginx/nginx.conf'
    ports:
     - '8000:80'
  #define the node app container
  app:
   container_name: <container name>
   build:
    context: .
    dockerfile: Dockerfile #name of the dockerfile we created
  ports:
   - '3000:80' #docker container port = 3000, host port= 80
  environment:
   - APPID=3000