add cloudflare dns option to letsencrypt via manual certificate

frontend/js/app/nginx/certificates/form.ejs

@@ -20,6 +20,24 @@
                             <input name="meta[letsencrypt_email]" type="email" class="form-control" placeholder="" value="<%- getLetsencryptEmail() %>" required>
                         </div>
                     </div>
+
+                    <!-- CloudFlare -->
+                    <div class="col-sm-12 col-md-12">
+                        <div class="form-group">
+                            <label class="custom-switch">
+                                <input type="checkbox" class="custom-switch-input" name="use_cloudflare" value="1">
+                                <span class="custom-switch-indicator"></span>
+                                <span class="custom-switch-description"><%= i18n('ssl', 'use-cloudflare') %></span>
+                            </label>
+                        </div>
+                    </div>
+                    <div class="col-sm-12 col-md-12 cloudflare">
+                        <div class="form-group">
+                            <label class="form-label">CloudFlare DNS API Token  <span class="form-required">*</span></label>
+                            <input type="text" name="cloudflare_dns_api_token" class="form-control" id="input-domains" required>                            
+                        </div>
+                    </div>
+
                     <div class="col-sm-12 col-md-12">
                         <div class="form-group">
                             <label class="custom-switch">

frontend/js/app/nginx/certificates/form.js

@@ -20,10 +20,20 @@ module.exports = Mn.View.extend({
         save:                           'button.save',
         other_certificate:              '#other_certificate',
         other_certificate_key:          '#other_certificate_key',
-        other_intermediate_certificate: '#other_intermediate_certificate'
+        other_intermediate_certificate: '#other_intermediate_certificate',
+        cloudflare_switch:              'input[name="use_cloudflare"]',
+        cloudflare:                     '.cloudflare'
     },
 
     events: {
+        'change @ui.cloudflare_switch': function() {
+            let checked = this.ui.cloudflare_switch.prop('checked');
+            if (checked) {
+                this.ui.cloudflare.show();
+            } else {
+                this.ui.cloudflare.hide();
+            }
+        },
         'click @ui.save': function (e) {
             e.preventDefault();
 
@@ -146,6 +156,7 @@ module.exports = Mn.View.extend({
             },
             createFilter: /^(?:[^.*]+\.?)+[^.]$/
         });
+        this.ui.cloudflare.hide();
     },
 
     initialize: function (options) {

frontend/js/i18n/messages.json

@@ -101,7 +101,8 @@
       "letsencrypt-email": "Email Address for Let's Encrypt",
       "letsencrypt-agree": "I Agree to the <a href=\"{url}\" target=\"_blank\">Let's Encrypt Terms of Service</a>",
       "delete-ssl": "The SSL certificates attached will NOT be removed, they will need to be removed manually.",
-      "hosts-warning": "These domains must be already configured to point to this installation"
+      "hosts-warning": "These domains must be already configured to point to this installation",
+      "use-cloudflare": "Use CloudFlare DNS verification"      
     },
     "proxy-hosts": {
       "title": "Proxy Hosts",