adding some basic help, also as another example of using plugin hooks

plugins/00_dokku-standard/commands

@@ -8,5 +8,12 @@ set -e; case "$1" in
   url)
     echo "http://$(< "/home/git/$2/ADDRESS")"
     ;;
+  
+  help)
+    cat && cat<<EOF
+    logs <app>      Show the last logs for an application
+    url <app>       Show the URL for an application
+EOF
+    ;;
 
 esac

plugins/nginx-vhosts/commands

@@ -8,5 +8,8 @@ set -e; case "$1" in
       cat
     fi
     ;;
+    
+  help) cat
+    ;;
 
 esac