Little bugfix for docker run example within readme

README.md

@@ -10,19 +10,19 @@ To make your data persistent, you have to mount `/var/www/app/public/logo` and `
 To run it:
 
 ```
-docker run -d
-  -e APP_ENV='production'
-  -e APP_DEBUG=0
-  -e APP_URL='http://ninja.dev'
-  -e APP_KEY='SomeRandomStringSomeRandomString'
-  -e APP_CIPHER='AES-256-CBC'
-  -e DB_TYPE='mysql'
-  -e DB_STRICT='false'
-  -e DB_HOST='localhost'
-  -e DB_DATABASE='ninja'
-  -e DB_USERNAME='ninja'
-  -e DB_PASSWORD='ninja'
-  -p '80:80'
+docker run -d \
+  -e APP_ENV='production' \
+  -e APP_DEBUG=0 \
+  -e APP_URL='http://ninja.dev' \
+  -e APP_KEY='SomeRandomStringSomeRandomString' \
+  -e APP_CIPHER='AES-256-CBC' \
+  -e DB_TYPE='mysql' \
+  -e DB_STRICT='false' \
+  -e DB_HOST='localhost' \
+  -e DB_DATABASE='ninja' \
+  -e DB_USERNAME='ninja' \
+  -e DB_PASSWORD='ninja' \
+  -p '80:80' \
   invoiceninja/invoiceninja
 ```
 A list of environment variables can be found [here](https://github.com/invoiceninja/invoiceninja/blob/master/.env.example)