Add support to switch between deno and nodejs function executor

templates/dashboard/http_functions/editor.html

@@ -32,6 +32,7 @@ history_url=url_for('http.history', function_id=function_id)) }}
     logRequest: {{ log_request | tojson }},
     logResponse: {{ log_response | tojson }},
     versionNumber: {{ version_number }},
+    runtime: '{{ runtime }}',
     executeUrl: "{{ url_for('execute_code', playground='true') }}",
     saveUrl: "{{ url_for('http.edit', function_id=id) if id else url_for('http.new') }}",
     deleteUrl: "{{ url_for('http.delete', function_id=id) if id else '' }}",