README: expand the documentation of the command parameters a bit

And switch to full package names so we can point to npmjs

README.md

@@ -3,14 +3,21 @@
 [GitLab Repository](https://gitlab.tugraz.at/dbp/cli) |
 [npmjs package](https://www.npmjs.com/package/@digital-blueprint/cli)
 
-This is CLI to manage DBP frontend applications and Symfony bundles.
+This is CLI to manage DBP frontend applications.
 
 ## Install apps
 
+`npx @digital-blueprint/cli install-app <package-name> <destination-directory> <server-path-prefix>`
+
+* `package-name` - the application that you want to install. See https://www.npmjs.com/search?q=%40dbp-topics for a list of applications.
+* `destination-directory` - the local directory where the application should be installed to
+* `server-path-prefix` - the URL path under which the application will be reachable on the web server. e.g. `/` in case it is `myapp.mydomain.org`, or `/myapp` in case it is `mydomain.org/myapp`.
+
 If you want to install the DBP Signature App in a new folder `signature-app` with a path prefix `/` you can call:
 
 ```bash
-npx @digital-blueprint/cli install-app signature signature-app /
+
+npx @digital-blueprint/cli install-app @dbp-topics/signature signature-app /
 ```
 
 Afterwards you can point your Apache web-server to `signature-app/public`.
@@ -32,10 +39,12 @@ To do this you can for example open a shell with `runuser -u www-data -- bash`.
 
 ## Update apps
 
+`npx @digital-blueprint/cli update-ap <package-name>`
+
 If you want to update the DBP Signature App in the current folder you can call:
 
 ```bash
-npx @digital-blueprint/cli update-app signature
+npx @digital-blueprint/cli update-app @dbp-topics/signature
 ```
 
 **Warning:** There may be issues when you run these commands as root user, best use a non-root user, like `www-data`.