Put commit hash and build time on admin page

setup.js

@@ -0,0 +1,24 @@
+/* eslint-disable no-console */
+const exec = require('child_process').exec;
+const fs = require('fs');
+
+const config = {
+  build: {},
+};
+
+function writeConfigFile() {
+  fs.writeFile('build/public/config.json', JSON.stringify(config), (err) => {
+    if (err) {
+      return console.error(err);
+    }
+    return console.log('Config file saved');
+  });
+}
+
+exec('git log -n 1 --pretty=format:"%H"', (err, stdout) => {
+  if (stdout) {
+    config.build.hash = stdout;
+    config.build.time = new Date();
+    writeConfigFile();
+  }
+});