Build frontend project into docker

1. create dockerfile
   1). config frontend project build
   
   2). config nginx
   
2. create nginx/default.conf
3. build docker
   sudo docker build -t imageName
4. run docker
   docker run --rm -d -p80:80 imageName
5. find docker host and port
   ifconfig
6. type docker host + post + frontendRoutePath in browser address bar, such as: http://localhost/login
7. login docker
   docker login
8. tag docker image
   docker tag imageName:version userName/imageName:version
9. push image to remote docker hub
   docker push dockerUserName/imageName:version