add robots.txt and sitemap.xml

Author: kpython

main.go

@@ -80,6 +80,15 @@ func main() {
 	loadData()
 
 	http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))
+
+	// Serve robots.txt and sitemap.xml at the site root to aid crawlers
+	http.HandleFunc("/robots.txt", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "static/robots.txt")
+	})
+	http.HandleFunc("/sitemap.xml", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "static/sitemap.xml")
+	})
+
 	http.HandleFunc("/", homeHandler)
 	http.HandleFunc("/draw/create", createDrawHandler)
 	http.HandleFunc("/draw/", drawHandler)

static/robots.txt

@@ -0,0 +1,3 @@
+User-agent: *
+Allow: /
+Sitemap: https://secret-santa-draw.app/sitemap.xml

static/sitemap.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <url>
+    <loc>https://secret-santa-draw.app/draw/create</loc>
+    <changefreq>weekly</changefreq>
+    <priority>0.8</priority>
+  </url>
+</urlset>