Merge pull request #4 from UniversityRadioYork/mp/server-tier-list

Add server tier list to contingencies page

docs/computing/contingencies/index.md

@@ -2,7 +2,11 @@
 
 i.e. What would break if Server X were to X-plode? Along with how to fix it, hopefully
 
-Failures that can cause **DEAD AIR** are in bold
+Failures that can cause **DEAD AIR** are in bold.
+
+See also the server tier list (by broadcast-critical-ness):
+
+<iframe src="https://docs.google.com/spreadsheets/d/e/2PACX-1vSIVYN3Pl_vDhtzwvUNwf77fRTCcu0S_RPYcdtWC6gyMW2jssh3GbStGv43KxppS0quXx3arO02UhJl/pubhtml?gid=0&amp;single=true&amp;widget=true&amp;headers=false" width="100%" height="500px"></iframe>
 
 ## Servers