Add jsonLD signing functions

website/EN/index.html

@@ -1264,7 +1264,7 @@
     <p class="intro">You will need python version 3.7 or later.</p>
     <p class="intro">On a Debian based system:</p>
     <div class="shell">
-      <p>sudo apt install -y tor python3-socks imagemagick python3-numpy python3-setuptools python3-crypto python3-cryptodome python3-dateutil python3-pil.imagetk python3-idna python3-requests python3-flake8 libimage-exiftool-perl certbot nginx</p>
+      <p>sudo apt install -y tor python3-socks imagemagick python3-numpy python3-setuptools python3-crypto python3-cryptodome python3-dateutil python3-pil.imagetk python3-idna python3-requests python3-flake8 python3-pyld libimage-exiftool-perl certbot nginx</p>
     </div>
 
     <p class="intro">