Connect attempt 1

WebApplication.kt

package com.example.demo

// import 

val dataRepo = DataRepository()

fun Application.main() {
// ...
        post("entries") {
            val entries = fromJsonStringToList(call.receiveText())
            val savedKeys = dataRepo.save(entries)
            call.respondText(contentType = ContentType.Application.Json) {
                Json.stringify(String.serializer().list, savedKeys.map { it.id.toString() })
            }
        }
    }
}