change Server to engineMain with config file (closes #3)

server/src/main/resources/application.conf

@@ -0,0 +1,35 @@
+ktor {
+    deployment {
+        # alle Server
+        port = 7770
+        host = 0.0.0.0
+        # defaults * 2
+        connectionGroupSize = 4
+        workerGroupSize = 10
+        callGroupSize = 20
+        shutdownGracePeriod = 2000
+        shutdownTimeout = 3000
+        # Netty defaults
+        maxInitialLineLength = 4096
+        maxHeaderSize = 8192
+        maxChunkSize = 8192
+    }
+    application {
+        # ApplicationKt.module() übernimmt die Konfiguration
+        modules = [ net.keinekekse.app.ApplicationKt.module ]
+    }
+    conf {
+        # eigene Parameter -> ktor.conf.<name>
+        #
+        keycloakInternalUrl = "http://kec:8080/realms"
+        keycloakUrl = "https://kec.keinekekse.net/realms"
+        keycloakRealm = "app-server-realm"
+        keycloakClientId = "pkce-book-app"
+        keycloakCertUrl = "protocol/openid-connect/certs"
+        # DB-Params werden vom Container als env vars gesetzt
+        dbHost = ${DB_HOST}
+        dbPort = ${DB_PORT}
+        dbUser = ${DB_USER}
+        dbPassword = ${DB_PASSWORD}
+    }
+}