Add note that deb repos are down

i2p2www/pages/downloads/debian.html

@@ -86,6 +86,15 @@ part of <a href="#Post-install_work">starting I2P</a> and configuring it for you
 
 <h2 id="debian">{{ _('Instructions for Debian') }}</h2>
 
+<p><b>WARNING:</b>
+Our Debian repos <a href="https://deb.i2p2.de/">deb.i2p2.de</a> and
+<a href="http://deb.i2p2.no/">deb.i2p2.no</a> are currently down, and probably will not be back soon.
+Please follow <a href="https://i2pforum.net/viewtopic.php?p=2855">these instructions</a>
+to use the Ubuntu PPA as a workaround.
+We will announce any updates here and on <a href="https://i2pforum.net/">i2pforum.net</a>.
+We apologize for the inconvenience.
+</p>
+
 <em>{% trans -%}Currently supported architectures{%- endtrans %}: amd64, i386, armhf, arm64, powerpc, ppc64el, s390x</em>
 
 <p>{% trans -%}