Update readme.md

Author: verwilst

readme.md

@@ -12,6 +12,8 @@ Make sure to chown all the data in your webroot to your own user, since docker s
 
 ## How to run
 
+### Initial steps
+
 > docker run --name myproject -it -d -v $(pwd):/app -w /app -p 8000:8000 verwilst/php7-cli php artisan serve --host=0.0.0.0
 
 You can now open your browser on http://127.0.0.1:8000 .
@@ -20,6 +22,12 @@ The project is configured to support live reloading. The browser opens a websock
 
 > docker run --name myproject-gulp -it -d -v $(pwd):/app -p 35729:35729 -w /app verwilst/gulp watch
 
+### Starting an existing app
+
+> docker start mongo percona myproject myproject-gulp
+
+( Leaving off mongo and/or percona if you didn't create those docker containers ofcourse. )
+
 ## When MongoDB is needed
 
 > docker run --name mongo -d mongo
@@ -30,6 +38,8 @@ Using the MongoDB console is as easy as calling:
 
 > docker exec -it mongo mongo admin
 
+In your app (.env, ... ), use 'mongo' as hostname for the Mongo server.
+
 ## When MySQL/Percona is needed
 
 > docker run --name percona -e MYSQL_ALLOW_EMPTY_PASSWORD=true -d percona
@@ -40,3 +50,5 @@ Using the MySQL console is as easy as calling:
 
 > docker exec -it percona mysql
 
+In your app (.env, ... ), use 'percona' as hostname for the MySQL server.
+