Form helper - explain where the webdriver setting comes from

changedetectionio/templates/edit.html

@@ -53,7 +53,7 @@ User-Agent: wonderbra 1.0") }}
                         {{ render_field(form.fetch_backend) }}
                         <span class="pure-form-message-inline">
                             <p>Use the <strong>Basic</strong> method (default) where your watched sites don't need Javascript to render.</p>
-                            <p>The <strong>Chrome/Javascript</strong> method requires a network connection to a running WebDriver+Chrome server. </p>
+                            <p>The <strong>Chrome/Javascript</strong> method requires a network connection to a running WebDriver+Chrome server, set by the ENV var 'WEBDRIVER_URL'. </p>
                         </span>
                     </div>
                     <div class="pure-control-group">

changedetectionio/templates/settings.html

@@ -61,7 +61,7 @@
                     {{ render_field(form.fetch_backend) }}
                     <span class="pure-form-message-inline">
                         <p>Use the <strong>Basic</strong> method (default) where your watched sites don't need Javascript to render.</p>
-                        <p>The <strong>Chrome/Javascript</strong> method requires a network connection to a running WebDriver+Chrome server. </p>
+                        <p>The <strong>Chrome/Javascript</strong> method requires a network connection to a running WebDriver+Chrome server, set by the ENV var 'WEBDRIVER_URL'. </p>
                     </span>
                 </div>
             </div>