Updated to openapi 3.1

src/main/kotlin/Application.kt

@@ -1,12 +1,22 @@
 package codes.kalar
 
+import io.ktor.http.*
 import io.ktor.server.application.*
 import io.ktor.server.plugins.contentnegotiation.*
 import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.engine.*
+import io.ktor.server.netty.*
+import io.ktor.server.plugins.cors.routing.*
 import kotlinx.serialization.json.Json
 
 fun main(args: Array<String>) {
-    io.ktor.server.netty.EngineMain.main(args)
+    embeddedServer(Netty, port = 8080) {
+        install(CORS) {
+            anyHost()
+            allowHeader(HttpHeaders.ContentType)
+        }
+    }.start(wait = true)
+    EngineMain.main(args)
 }
 
 fun Application.module() {
@@ -16,6 +26,7 @@ fun Application.module() {
             isLenient = true
         })
     }
+
     configureHTTP()
     configureSecurity()
     configureSerialization()