feat: Sprint 0 — GoFiber + HTMX + TailwindCSS v4 scaffolding

- Go module: git.tukangketik.id/swanadiva/hostkeeper/v2
- GoFiber v2 server with static, template engine, middleware
- HTMX + Alpine.js (downloaded from CDN)
- TailwindCSS v4 with custom theme (Lumina System colors)
- Custom CSS: dot-grid, glassmorphism, animations, toggle, modal
- Layout template (sidebar nav + header + main)
- Dashboard page with host list, search, filter, view toggle
- Health endpoint: GET /api/health

app/backend/main.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"log"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/compress"
+	"github.com/gofiber/fiber/v2/middleware/logger"
+	"github.com/gofiber/fiber/v2/middleware/recover"
+	"github.com/gofiber/template/html/v2"
+
+	"git.tukangketik.id/swanadiva/hostkeeper/v2/internal/handler"
+)
+
+func main() {
+	engine := html.New("./views", ".html")
+	engine.Reload(true)
+	engine.AddFunc("svg", func(name string) string {
+		return "" // TODO: inline SVG icons
+	})
+
+	app := fiber.New(fiber.Config{
+		Views: engine,
+	})
+
+	app.Use(logger.New())
+	app.Use(recover.New())
+	app.Use(compress.New())
+	app.Static("/static", "./static")
+
+	app.Get("/", handler.Dashboard)
+	app.Get("/hosts", handler.Dashboard)
+	app.Get("/api/health", handler.Health)
+
+	log.Fatal(app.Listen(":1947"))
+}