Initial commit with server startup infrastructure

Core infrastructure:
- Uber fx dependency injection
- Chi router with middleware stack
- SQLite database with embedded migrations
- Embedded templates and static assets
- Structured logging with slog

Features implemented:
- Authentication (login, logout, session management, argon2id hashing)
- App management (create, edit, delete, list)
- Deployment pipeline (clone, build, deploy, health check)
- Webhook processing for Gitea
- Notifications (ntfy, Slack)
- Environment variables, labels, volumes per app
- SSH key generation for deploy keys

Server startup:
- Server.Run() starts HTTP server on configured port
- Server.Shutdown() for graceful shutdown
- SetupRoutes() wires all handlers with chi router

internal/handlers/dashboard.go

@@ -0,0 +1,33 @@
+package handlers
+
+import (
+	"net/http"
+
+	"git.eeqj.de/sneak/upaas/internal/models"
+	"git.eeqj.de/sneak/upaas/templates"
+)
+
+// HandleDashboard returns the dashboard handler.
+func (h *Handlers) HandleDashboard() http.HandlerFunc {
+	tmpl := templates.GetParsed()
+
+	return func(writer http.ResponseWriter, request *http.Request) {
+		apps, fetchErr := models.AllApps(request.Context(), h.db)
+		if fetchErr != nil {
+			h.log.Error("failed to fetch apps", "error", fetchErr)
+			http.Error(writer, "Internal Server Error", http.StatusInternalServerError)
+
+			return
+		}
+
+		data := map[string]any{
+			"Apps": apps,
+		}
+
+		execErr := tmpl.ExecuteTemplate(writer, "dashboard.html", data)
+		if execErr != nil {
+			h.log.Error("template execution failed", "error", execErr)
+			http.Error(writer, "Internal Server Error", http.StatusInternalServerError)
+		}
+	}
+}