Add pprof links to landing page

Make it easier for users to fetch and download pprof data for debugging.
* Add a link to https://pprof.me for easy sharing.

Signed-off-by: SuperQ <superq@gmail.com>

web/landing_page.html

@@ -12,6 +12,14 @@ <h1>{{.Name}}</h1>
     <main>
       {{if .Description}}<h2>{{.Description}}</h2>{{end}}
       {{if .Version}}<div>Version: {{.Version}}</div>{{end}}
+      <div>
+      Go pprof debugging profile data:
+      <ul>
+        <li><a href="debug/pprof/heap">heap usage (memory)</a>
+        <li><a href="debug/pprof/profile">CPU usage (takes some time to gather)</a>
+      </ul>
+      Try posting these to <a href="https://pprof.me" target="_blank">pprof.me</a>
+      </div>
       <div>
         <ul>
           {{ range .Links }}