Document the -r <repository> option of the kn func create command

Change argument order in a command

Author: rh-max

modules/serverless-create-func-kn.adoc

@@ -3,15 +3,15 @@
 
 You can create a basic serverless function using the `kn` CLI.
 
-You can specify the path, runtime, and template as flags on the command line, or use the `-c` flag to start the interactive experience in the terminal.
+You can specify the path, runtime, template, and repository with the template as flags on the command line, or use the `-c` flag to start the interactive experience in the terminal.
 
 .Procedure
 
 * Create a function project:
 +
 [source,terminal]
 ----
-$ kn func create <path> -l <runtime> -t <template>
+$ kn func create -r <repository> -l <runtime> -t <template> <path>
 ----
 ** Supported runtimes include `node`, `go`, `python`, `quarkus`, and `typescript`.
 ** Supported templates include `http` and `events`.
@@ -31,3 +31,21 @@ Runtime:       typescript
 Template:      events
 Writing events to /home/user/demo/examplefunc
 ----
++
+** Alternatively, you can specify a repository that contains a custom template.
++
+.Example command
+[source,terminal]
+----
+$ kn func create -r https://github.com/boson-project/templates/ -l node -t hello-world examplefunc
+----
++
+.Example output
+[source,terminal]
+----
+Project path:  /home/user/demo/examplefunc
+Function name: examplefunc
+Runtime:       node
+Template:      hello-world
+Writing events to /home/user/demo/examplefunc
+----