Re #121, #123 - Show the current base_url value

backend/__init__.py

@@ -509,7 +509,10 @@ def changedetection_app(config=None, datastore_o=None):
         if request.method == 'POST' and not form.validate():
             flash("An error occurred, please see below.", "error")
 
-        output = render_template("settings.html", form=form)
+        # Same as notification.py
+        base_url = os.getenv('BASE_URL', '').strip('"')
+        output = render_template("settings.html", form=form, base_url=base_url)
+
         return output
 
     @app.route("/import", methods=['GET', "POST"])

backend/templates/settings.html

@@ -82,7 +82,8 @@ SMTPS - mailtos://user:pass@mail.domain.com?to=receivingAddress@example.com") }}
                             </tbody>
                         </table>
                         <span class="pure-form-message-inline">
-                            URLs generated by changedetection.io (such as <code>{diff_url}</code>) require the <code>BASE_URL</code> environment variable set.
+                            URLs generated by changedetection.io (such as <code>{diff_url}</code>) require the <code>BASE_URL</code> environment variable set.<br/>
+                            Your <code>BASE_URL</code> var is currently "{{base_url}}"
                         </span>
                     </div>
                 </div>