move github.context logging from collect_all to action.js

src/action.js

@@ -1,6 +1,11 @@
+import * as github from '@actions/github';
 import {collect_all} from './index';
 import {isTrueString} from './lib';
 
 const debug = isTrueString(process.env['ACTIONS_STEP_DEBUG']);
 
+if (debug) {
+  console.log(JSON.stringify(github.context, null, 2));
+}
+
 collect_all(debug, true);