added content to about and contact page and added main-handler to achive spa-functionality

handlers/main_handler.go

@@ -0,0 +1,28 @@
+package handlers
+
+import (
+	"embed"
+	"html/template"
+	"log"
+	"net/http"
+)
+
+// MainHandler
+func MainHandler(content embed.FS) http.HandlerFunc {
+	log.Print("MainHandler called")
+	return func(w http.ResponseWriter, r *http.Request) {
+		tmpl, err := template.ParseFS(content, "templates/main.html", "templates/monsterForm.html", "templates/monster.html", "templates/monsterTable.html")
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		err = tmpl.ExecuteTemplate(w, "main", map[string]interface{}{
+			"Title": "Dungeons & Dragons Monster Generator",
+		})
+		if err != nil {
+			log.Printf("Template execution error: %v\n", err)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+		}
+	}
+}