add initial application structure with configuration, logging, and health check endpoints

cmd/server/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"context"
+	"log"
+
+	"epic-ent/internal/bootstrap"
+)
+
+func main() {
+	app := bootstrap.NewApp()
+
+	if err := app.Start(context.Background()); err != nil {
+		log.Fatalf("failed to start app: %v", err)
+	}
+
+	<-app.Done()
+
+	if err := app.Stop(context.Background()); err != nil {
+		log.Printf("failed to stop app: %v", err)
+	}
+}