add template for startup and readme

startup/template/server/build.gradle

@@ -0,0 +1,16 @@
+plugins {
+    id "org.jetbrains.kotlin.multiplatform"
+    id "org.jetbrains.kotlin.plugin.serialization"
+}
+
+apply from: "$mppJavaProjectPresetPath"
+
+kotlin {
+    sourceSets {
+        commonMain {
+            dependencies {
+                api project(":${rootProject.name}.module_name.common")
+            }
+        }
+    }
+}