fix: set font-src to 'self' on questions (#101)

Author: httpjamesm

templates/question.html

@@ -7,7 +7,7 @@
         <link rel="stylesheet" href="/static/comments.css" />
         <meta
             http-equiv="Content-Security-Policy"
-            content="default-src 'none'; style-src 'self'; script-src 'self'; img-src {{ .imagePolicy }};"
+            content="default-src 'none'; style-src 'self'; script-src 'self'; img-src {{ .imagePolicy }}; font-src 'self';"
         />
         <meta name="description" content="{{ .question.ShortenedBody }}..." />
         {{ template "sharedHead.html" }}