feat(ui): Make logo link and header configurable

Closes #213

config/ui/ui.go

@@ -6,8 +6,10 @@ import (
 )
 
 const (
-	defaultTitle = "Health Dashboard | Gatus"
-	defaultLogo  = ""
+	defaultTitle  = "Health Dashboard | Gatus"
+	defaultHeader = "Health Status"
+	defaultLogo   = ""
+	defaultLink   = ""
 )
 
 var (
@@ -18,15 +20,19 @@ var (
 
 // Config is the configuration for the UI of Gatus
 type Config struct {
-	Title string `yaml:"title"` // Title of the page
-	Logo  string `yaml:"logo"`  // Logo to display on the page
+	Title  string `yaml:"title,omitempty"`  // Title of the page
+	Header string `yaml:"header,omitempty"` // Header is the text at the top of the page
+	Logo   string `yaml:"logo,omitempty"`   // Logo to display on the page
+	Link   string `yaml:"link,omitempty"`   // Link to open when clicking on the logo
 }
 
 // GetDefaultConfig returns a Config struct with the default values
 func GetDefaultConfig() *Config {
 	return &Config{
-		Title: defaultTitle,
-		Logo:  defaultLogo,
+		Title:  defaultTitle,
+		Header: defaultHeader,
+		Logo:   defaultLogo,
+		Link:   defaultLink,
 	}
 }
 
@@ -35,6 +41,12 @@ func (cfg *Config) ValidateAndSetDefaults() error {
 	if len(cfg.Title) == 0 {
 		cfg.Title = defaultTitle
 	}
+	if len(cfg.Header) == 0 {
+		cfg.Header = defaultHeader
+	}
+	if len(cfg.Header) == 0 {
+		cfg.Header = defaultLink
+	}
 	t, err := template.ParseFiles(StaticFolder + "/index.html")
 	if err != nil {
 		return err