Add XMPP guide

pages/guides.html

@@ -43,6 +43,7 @@
                 <a href="/guides/hackernews">Adding a Hackernews proof</a><br>
                 <a href="/guides/reddit">Adding a Reddit proof</a><br>
                 <a href="/guides/github">Adding a Github proof</a><br>
+                <a href="/guides/xmpp">Adding a XMPP proof</a><br>
             </div>
 
             <footer>

pages/guides/xmpp.content.html

@@ -0,0 +1,30 @@
+<p><strong>WARNING: XMPP proofs are a work in progress. XMPP URIs are supported and displayed but NOT verified at the moment.</strong></p>
+
+<p>Let's add a decentralized XMPP proof to your OpenPGP keys.</p>
+
+<h3>Add a message to your XMPP vCard</h3>
+
+<p>Using a XMPP client that supports editing the vCard (such as <a href="https://dino.im/">Dino</a> and <a href="https://gajim.org/">Gajim</a>), append the following message to the <strong>About</strong> section (make sure to replace FINGERPRINT):</p>
+<code>This is an OpenPGP proof that connects my OpenPGP key to this XMPP account.
+For details check out https://keyoxide.org/guides/openpgp-proofs
+<br><br>[Verifying my OpenPGP key: openpgp4fpr:FINGERPRINT]
+</code>
+
+<h3>Update the PGP key</h3>
+
+<p>First, edit the key (make sure to replace FINGERPRINT):</p>
+<code>gpg --edit-key FINGERPRINT</code>
+
+<p>Add a new notation:</p>
+<code>notation</code>
+
+<p>Enter the notation (make sure to replace JABBERID):</p>
+<code>proof@metacode.biz=xmpp:JABBERID</code>
+
+<p>Save the key:</p>
+<code>save</code>
+
+<p>Upload the key to WKD or <a href="https://keys.openpgp.org">keys.openpgp.org</a> (make sure to replace FINGERPRINT):</p>
+<code>gpg --send-keys FINGERPRINT</code>
+
+<p>And you're done! Reload your profile page, it should now show a XMPP account.</p>

pages/guides/xmpp.title.html

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+Adding a XMPP proof