Client build scripts fixes and server stub with local devzone.

server/internal/application/server.go

@@ -0,0 +1,26 @@
+package application
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+// ShutdownChan returns shutdown channel for main function.
+func (a *Application) ShutdownChan() chan struct{} {
+	return a.shutdownChan
+}
+
+func (a *Application) startServer() {
+	a.shutdownChan = make(chan struct{})
+
+	go func() {
+		listener := make(chan os.Signal, 1)
+
+		signal.Notify(listener, syscall.SIGTERM, os.Interrupt)
+
+		<-listener
+
+		a.shutdownChan <- struct{}{}
+	}()
+}