port80 requirement is more complex

src/views/domains.html

@@ -110,7 +110,7 @@
               <div class="form-group">
                 <label class="control-label">Certificate Provider</label>
                 <select class="form-control" ng-model="domainConfigure.tlsConfig.provider" ng-options="a.value as a.name for a in tlsProvider"></select>
-                <small class="text-info" ng-show="domainConfigure.tlsConfig.provider === 'letsencrypt-prod' || domainConfigure.tlsConfig.provider === 'letsencrypt-staging'">Let's Encrypt requires your server to be reachable on port 80</small>
+                <small class="text-info" ng-show="needsPort80(domainConfigure.provider, domainConfigure.tlsConfig.provider)">Let's Encrypt requires your server to be reachable on port 80</small>
               </div>
 
               <!-- Fallback certificate -->