Clarify usage options print

Update subcommand validation.

src/main/kotlin/org/domaindrivenarchitecture/provs/server/application/Application.kt

@@ -18,7 +18,7 @@ fun main(args: Array<String>) {
     val checkedArgs = if (args.isEmpty()) arrayOf("-h") else args
 
     // validate subcommand
-    if (!ServerType.values().any {it.name.lowercase() == args[0]}) {
+    if (!checkedArgs.contains("-h") && !ServerType.values().any {it.name.lowercase() == checkedArgs[0]}) {
         println("Unknown serverType. Currently only k3s is accepted.")
         exitProcess(1)
     }

src/main/kotlin/org/domaindrivenarchitecture/provs/server/application/CliArgumentsParser.kt

@@ -54,7 +54,7 @@ class CliArgumentsParser(name: String) : CliTargetParser(name) {
         var submodules: List<String>? = null
     }
 
-    class K3s : ServerSubcommand("k3s", "the k3s module") {
+    class K3s : ServerSubcommand("k3s", "the k3s module, 'provs-server.jar k3s --help' for more info") {
         val cliConfigFileName by option(
             ArgType.String,
             "config-file",
@@ -82,7 +82,7 @@ class CliArgumentsParser(name: String) : CliTargetParser(name) {
         }
     }
 
-    class K3d : ServerSubcommand("k3d", "the k3s module") {
+    class K3d : ServerSubcommand("k3d", "the k3d module, 'provs-server.jar k3d --help' for more info") {
         override fun execute() {
             TODO("Not yet implemented")
         }