add -apply flag, add webserver

pkg/server/server.go

@@ -0,0 +1,32 @@
+package server
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+
+	"golang.org/x/exp/slog"
+
+	"nfsense.net/nfsense/pkg/definitions"
+)
+
+var server http.Server
+
+func StartWebserver(conf *definitions.Config) {
+	server.Addr = ":8080"
+	go func() {
+		if err := server.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) {
+			slog.Error("Webserver error", err)
+		}
+		slog.Info("Webserver Stopped")
+	}()
+}
+
+func ShutdownWebserver(ctx context.Context) error {
+	err := server.Shutdown(ctx)
+	if err != nil {
+		return fmt.Errorf("Shutting down: %w", err)
+	}
+	return nil
+}