feat(ui): Allow configuring meta description (#342)

* feat: add description prop to HTML template

* feat: add desc property to backend config validation

* test: add desc field to ui config test

* chore: add default description text

* test: add test for description default

* docs: add description config option explanation

* Update README.md

* Update config/ui/ui_test.go

Co-authored-by: TwiN <twin@linux.com>

config/ui/ui_test.go

@@ -7,10 +7,11 @@ import (
 
 func TestConfig_ValidateAndSetDefaults(t *testing.T) {
 	cfg := &Config{
-		Title:  "",
-		Header: "",
-		Logo:   "",
-		Link:   "",
+		Title:       "",
+		Description: "",
+		Header:      "",
+		Logo:        "",
+		Link:        "",
 	}
 	if err := cfg.ValidateAndSetDefaults(); err != nil {
 		t.Error("expected no error, got", err.Error())
@@ -18,6 +19,9 @@ func TestConfig_ValidateAndSetDefaults(t *testing.T) {
 	if cfg.Title != defaultTitle {
 		t.Errorf("expected title to be %s, got %s", defaultTitle, cfg.Title)
 	}
+	if cfg.Description != defaultDescription {
+		t.Errorf("expected description to be %s, got %s", defaultDescription, cfg.Description)
+	}
 	if cfg.Header != defaultHeader {
 		t.Errorf("expected header to be %s, got %s", defaultHeader, cfg.Header)
 	}