title: where to get settings in docker-compose.yml
body: <p>I am new in docker for windows and I am reading what is inside in docker-compose.yml. I am confuse where I can get those settings and other settings that I will need in my webapp.</p>
  
  <p>example like this the mysql setting where this setting comming from ?</p>
  
  <pre><code> mysql:
  build: ./bin/mysql
  container_name: 'my-mysql'
  command: --default-authentication-plugin=mysql_native_password
  restart: 'always'
  ports:
    - "3306:3306"
  volumes:
    - ${MYSQL_DATA_DIR-./data/mysql}:/var/lib/mysql
    - ${MYSQL_LOG_DIR-./logs/mysql}:/var/log/mysql
  environment:
    MYSQL_ROOT_PASSWORD: tiger
  networks:
    - web-db-net
  </code></pre>
  
  <p>what if I need Nginx ? what is my settings where I can get the reference setting for this ?</p>