🚀(docker) dockerize frontend dev

Dockerize the frontend development environment
to make it easy to display the frontend
development environment in the browser.

We don't mix it with the command `make run` to
let it kind of optional to run the frontend
in a docker container. We let it optional because
the hot reload doesn't work well in the docker
container. The volume synch make it a bit slower
as well. So, we let the developer decide to run
the frontend in a docker container or not.

README.md

@@ -31,10 +31,7 @@ The easiest way to start working on the project is to use GNU Make:
 $ make bootstrap FLUSH_ARGS='--no-input'
 ```
 
-Then you can run the following command to start the project in development mode:
-```bash
-$ make run-front-impress
-```
+Then you can access to the project in development mode by going to http://localhost:3000.
 You will be prompted to log in, the default credentials are:
 ```bash
 username: impress
@@ -52,7 +49,7 @@ Your Docker services should now be up and running 🎉
 Note that if you need to run them afterwards, you can use the eponym Make rule:
 
 ```bash
-$ make run
+$ make run-frontend-dev
 ```
 
 ### Adding content