refactor: add arguments support to run client or server

app/build.gradle

@@ -40,3 +40,19 @@ tasks.named('test') {
     // Use JUnit Platform for unit tests.
     useJUnitPlatform()
 }
+
+task runServer(type: JavaExec) {
+    description = 'Runs the server'
+    group = 'application'
+    mainClass = application.mainClass
+    classpath = sourceSets.main.runtimeClasspath
+    args = ['server']
+}
+
+task runClient(type: JavaExec) {
+    description = 'Runs the client'
+    group = 'application'
+    mainClass = application.mainClass
+    classpath = sourceSets.main.runtimeClasspath
+    args = ['client']
+}