[SITE] add a new url exception for special urls

- for custom pretix urls, you can now specify the url
- if you have a typo in devopsdays, you can not override the url

Signed-off-by: Toshaan Bharvani <toshaan@vantosh.com>

Author: toshywoshy

themes/devopsdays-theme/layouts/shortcodes/tix.html

@@ -1,7 +1,10 @@
+{{ $url := .Get "url" }}
 {{ $city := .Get "city" }}
 {{ $year := .Get "year" }}
 {{ $info := .Get "info" }}
 
+{{- if eq $url "" -}}
+
 <link rel="stylesheet" type="text/css" href="https://tickets.devopsdays.org/devopsdays-{{ $city }}/{{ $year }}/widget/v1.css">
 <script type="text/javascript" src="https://tickets.devopsdays.org/widget/v1.en.js" async></script>
 
@@ -13,3 +16,19 @@
         </div>
     </div>
 </noscript>
+
+{{- else -}}
+
+<link rel="stylesheet" type="text/css" href="{{ $url }}/widget/v1.css">
+<script type="text/javascript" src="https://tickets.devopsdays.org/widget/v1.en.js" async></script>
+
+<pretix-widget event="{{ $url }}" {{- if eq $info "show" -}} display-event-info{{- end -}}></pretix-widget>
+<noscript>
+   <div class="pretix-widget">
+        <div class="pretix-widget-info-message">
+            JavaScript is disabled in your browser. To access our ticket shop without JavaScript, please <a target="_blank" rel="noopener" href="{{ $url }}">click here</a>.
+        </div>
+    </div>
+</noscript>
+
+{{- end -}}