Added ${PWD##*/} to adapt to docker image naming

Author: Ekwav

docker/README.md

@@ -4,7 +4,7 @@ First, install [Docker Compose](https://docs.docker.com/compose/install/).
 
 Second, initialize a new UserFrosting project:
 
-1. Copy `app/sprinkles.example.json` to `app/sprinkles.json`
+1. Run `cp app/sprinkles.example.json app/sprinkles.json`
 2. Run `chmod 777 app/{logs,cache,sessions}` to fix file permissions for web server. (NOTE: File
    permissions should be properly secured in a production environment!)   
    or run `sudo chown -R 33 app/{logs,cache,sessions}` (Changes the user to the www-data user of the image, more information [here](https://serversforhackers.com/c/dckr-file-permissions) )
@@ -15,13 +15,13 @@ Now you can start up the entire Nginx + PHP + MySQL stack using docker with:
 
     $ sudo docker-compose up -d
 
-On the first run you need to init the database (your container name may be different depending on the name of your root directory):
+On the first run you need to init the database (Be sure to execute this in the same directory, `${PWD##*/}` is a statement to get your current working directorys name):
 
-    $ sudo docker exec -it -u www-data userfrosting_php_1 bash -c 'php bakery migrate'
+    $ sudo docker exec -it -u www-data ${PWD##*/}_php_1 bash -c 'php bakery migrate'
 
-You also need to setup the first admin user (again, your container name may be different depending on the name of your root directory):
+You also need to setup the first admin user (again, `${PWD##*/}` is a statement to get your current working directorys name):
 
-    $ sudo docker exec -it -u www-data userfrosting_php_1 bash -c 'php bakery create-admin'
+    $ sudo docker exec -it -u www-data ${PWD##*/}_php_1 bash -c 'php bakery create-admin'
 
 Now visit http://localhost:8570/ to see your UserFrosting homepage!