chore: establish local platform baseline

cmd/callbacks/main.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"context"
+	"log"
+	"os/signal"
+	"syscall"
+
+	"data-terminal-cloud/internal/app"
+)
+
+type applicationRunner func(context.Context, string) error
+
+func run(ctx context.Context, runner applicationRunner) error {
+	return runner(ctx, "callbacks")
+}
+
+func main() {
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+	if err := run(ctx, app.Run); err != nil {
+		log.Fatal(err)
+	}
+}