Angular5 docker(prod)

docker-compose-prod.yml:
```
version: '2'

services:
  web:
    build:
      context: .
      dockerfile: ./Dockerfile_prod
    command: /bin/bash -c "envsubst '$$NGINX_HOST $$NGINX_PORT' < /etc/nginx/conf.d/angular-seed.template > /etc/nginx/conf.d/default.conf && nginx -g 'daemon off;'"
    container_name: angular-seed-prod
    image: angular-seed/prod
    environment:
      - ENV=staging
      - NGINX_HOST=localhost
      - NGINX_PORT=80
    networks:
      - prod-network
    ports:
      - '5555:80'

networks:
  prod-network:
    driver: bridge
```
Dockerfile_prod:
```
FROM node:8.6 as builder

WORKDIR /home/node/angular-seed

# copy all files not listed in .dockerignore
COPY . .

# before switching to non-root user, change ownership of home
RUN chown -R node:node .
USER node

RUN npm install
RUN ./node_modules/@angular/cli/bin/ng build --prod --env=prod

FROM nginx:1.13
COPY --from=builder /home/node/angular-seed/dist /var/www/dist/prod
COPY ./nginx.conf /etc/nginx/conf.d/angular-seed.template

```

nginx.conf:

```
map $http_upgrade $connection_upgrade {
  default upgrade;
  ''      close;
}

server {

  listen ${NGINX_PORT};

  server_name ${NGINX_HOST};
  #  ssl                 on;
  #  ssl_certificate     angular-seed_server.crt;
  #  ssl_certificate_key angular-seed_server.pem;
  #
  #  ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
  #  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  #  ssl_prefer_server_ciphers on;
  #  ssl_session_cache shared:SSL:10m;
  #  ssl_session_tickets off; # Requires nginx >= 1.5.9
  #  add_header Strict-Transport-Security "max-age=63072000; preload";
  #  add_header X-Frame-Options DENY;
  #
  #  location /api/microservice1 {
  #    rewrite ^/api/microservice1/(.*)$ /$1 break;
  #    proxy_pass https://microservice1/;
  #    proxy_http_version 1.1;
  #    proxy_set_header X-Forwarded-For $remote_addr;
  #  }

  location / {
    root /var/www/dist/prod;
    try_files $uri /index.html;
    index index.html;
    gzip on;
    gzip_types text/css text/javascript application/x-javascript application/json;
  }

}
```