exit if unable to load template at init

handlers/upload/templates/templates.go

@@ -4,6 +4,7 @@ import (
 	_ "embed"
 	"html/template"
 	"mime/multipart"
+	"os"
 	"strconv"
 	"strings"
 	"sync"
@@ -40,7 +41,7 @@ var GetUploadForm = sync.OnceValue[*template.Template](func() *template.Template
 	tmpl, err := template.New("uploadForm").Funcs(funcMap).Parse(form)
 	if err != nil {
 		log.Err(err).Msg("unable to parse upload form")
-		return nil
+		os.Exit(1)
 	}
 	return tmpl
 })