parameterize altcha challenge url

Author: overheadhunter

layouts/partials/captcha.html

@@ -1,5 +1,6 @@
+{{ $defaultChallengeUrl :=  printf "%s/altcha/challenge.php" .Site.Params.legacyApiUrl }}
 <altcha-widget
-  challengeurl="{{ .Site.Params.legacyApiUrl }}/altcha/challenge.php"
+  challengeurl="{{ .challengeUrl | default $defaultChallengeUrl }}"
   hidelogo
   hidefooter
   floating="auto"

layouts/partials/supporter-cert-contributor.html

@@ -18,7 +18,8 @@
       <button :disabled="feedbackData.inProgress || !acceptTerms || captchaState == 'verifying'" type="submit" class="btn btn-primary w-full md:w-64" data-umami-event="supporter-cert-contributor-form" x-cloak>
         <i :class="{'fa-paper-plane': !feedbackData.inProgress, 'fa-spinner fa-spin': feedbackData.inProgress}" class="fa-solid" aria-hidden="true"></i> {{ i18n "supporter_cert_common_submit" }}
       </button>
-      {{ partial "captcha.html" (dict "captchaPayload" "submitData.captcha" "captchaState" "captchaState") }}
+      {{ $captchaUrl :=  printf "%s/altcha/challenge.php" .Site.Params.legacyApiUrl }}
+      {{ partial "captcha.html" (dict "challengeUrl" $captchaUrl "captchaPayload" "submitData.captcha" "captchaState" "captchaState") }}
       <p :class="{'hidden': !feedbackData.errorMessage}" class="text-sm text-red-600 mt-2" x-text="feedbackData.errorMessage"></p>
     </div>
   </form>