initial way to run the server:

sbt:backend> assembly
java -jar backend/target/scala-3.2.0/backend-assembly-0.1.0-SNAPSHOT.jar

backend/src/main/scala/industries/sunshine/planningpoker/MyHttpService.scala

@@ -22,16 +22,12 @@ object MyHttpService {
 
     val authedRoomRoutes: AuthedRoutes[(PlayerID, RoomID), IO] =
       AuthedRoutes.of {
-        case GET -> Root / subscribe as (playerId, roomId) => {
+        case GET -> Root / "subscribe" as (playerId, roomId) => {
           val send: Stream[IO, WebSocketFrame] =
-          {
-            val a = Stream
+          Stream
               .emits(TestModels.testChangesList)
               .covary[IO].metered(5.second).map(state => WebSocketFrame.Text(state.asJson.noSpaces))
-            Stream
-              .awakeEvery[IO](1.seconds)
-              .map(_ => WebSocketFrame.Text("text"))
-          }
+
           val receive: Pipe[IO, WebSocketFrame, Unit] = _.evalMap {
             case WebSocketFrame.Text(text, _) => Sync[IO].delay(println(text))
             case other                        => Sync[IO].delay(println(other))
@@ -40,13 +36,13 @@ object MyHttpService {
         }
         case GET -> Root / "vote" / vote as (playerId, roomId) => {
           // TODO forward these to the service implementation
-          Ok(s">> got $vote from $playerId in $roomId")
+          IO(println(s">> got $vote from $playerId in $roomId")) >> Ok()
         }
         case GET -> Root / "end-voting" as (playerId, roomId) => {
-          Ok(s">> got request to end voting from $playerId in $roomId")
+          IO(println(s">> got request to end voting from $playerId in $roomId")) >> Ok()
         }
         case GET -> Root / "new-poll" as (playerId, roomId) => {
-          Ok(s">> got request to start new voting from $playerId in $roomId")
+          IO(println(s">> got request to start new voting from $playerId in $roomId")) >> Ok()
         }
       }
 
@@ -55,7 +51,7 @@ object MyHttpService {
 
     val authenticationRoute = HttpRoutes
       .of[IO] {
-        case req @ POST -> Root / login => {
+        case req @ POST -> Root / "login" => {
           for {
             data <- req.as[Requests.LogIn]
             authResult <- auth.accessRoom(
@@ -76,7 +72,6 @@ object MyHttpService {
             }
           } yield resp
         }
-        case _ => Ok("hello")
       }
 
     (authenticationRoute <+> authMiddleware(authedRoomRoutes)).orNotFound

build.sbt

@@ -52,7 +52,8 @@ lazy val backend = project
     // available for 2.12, 2.13, 3.2
     libraryDependencies += "co.fs2" %% "fs2-core" % "3.6.1",
     libraryDependencies += "org.typelevel" %% "cats-core" % "2.9.0",
-    libraryDependencies += "org.typelevel" %% "cats-effect" % "3.4.9"
+    libraryDependencies += "org.typelevel" %% "cats-effect" % "3.4.9",
+    assembly / mainClass := Some("industries.sunshine.planningpoker.BackendApp"),
   )
   .dependsOn(common.jvm)
 

flake.nix

@@ -13,6 +13,7 @@
               pkgs.nodejs
               pkgs.sbt
               pkgs.scalafmt
+              pkgs.jdk
               # pkgs.nodePackages.tailwindcss
               # pkgs.nodePackages.postcss
             ];

project/plugins.sbt

@@ -1,2 +1,3 @@
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.13.1")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.0.0")
+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.1.1")