added ver to qsurvey url

app/templates/header.js

@@ -1,5 +1,16 @@
 const html = require('choo/html');
 const assets = require('../../common/assets');
+/*
+  The current weback config uses package.json to generate
+  version.json for /__version__ meaning `require` returns the
+  string 'version.json' in the frontend context but the json
+  on the server.
+
+  We want `version` to be constant at build time so this file
+  has a custom loader (/build/version_loader.js) just to replace
+  string with the value from package.json. 🤢
+*/
+const version = require('../../package.json').version || 'VERSION';
 
 module.exports = function(state) {
   return html`<header class="header">
@@ -14,8 +25,9 @@ module.exports = function(state) {
       <div>${state.translate('siteSubtitle')}</div>
     </div>
   </div>
-  <a href="https://qsurvey.mozilla.com/s3/txp-firefox-send" rel="noreferrer noopener" class="feedback" target="_blank">${state.translate(
-    'siteFeedback'
-  )}</a>
+  <a href="https://qsurvey.mozilla.com/s3/txp-firefox-send?ver=${version}"
+    rel="noreferrer noopener"
+    class="feedback"
+    target="_blank">${state.translate('siteFeedback')}</a>
 </header>`;
 };

build/version_loader.js

@@ -0,0 +1,5 @@
+const version = require('../package.json').version;
+
+module.exports = function(source) {
+  return source.replace('VERSION', version);
+};

webpack.config.js

@@ -4,6 +4,12 @@ const CopyPlugin = require('copy-webpack-plugin');
 const ManifestPlugin = require('webpack-manifest-plugin');
 const IS_DEV = process.env.NODE_ENV === 'development';
 
+const regularJSOptions = {
+  babelrc: false,
+  presets: [['env', { modules: false }], 'stage-2'],
+  plugins: ['yo-yoify']
+};
+
 module.exports = {
   entry: {
     vendor: ['babel-polyfill', 'fluent'],
@@ -31,6 +37,16 @@ module.exports = {
               }
             ]
           },
+          {
+            include: require.resolve('./app/templates/header'),
+            use: [
+              {
+                loader: 'babel-loader',
+                options: regularJSOptions
+              },
+              './build/version_loader'
+            ]
+          },
           {
             include: [path.dirname(require.resolve('fluent'))],
             use: [
@@ -55,11 +71,7 @@ module.exports = {
               path.resolve(__dirname, 'node_modules/fluent-intl-polyfill'),
               path.resolve(__dirname, 'node_modules/intl-pluralrules')
             ],
-            options: {
-              babelrc: false,
-              presets: [['env', { modules: false }], 'stage-2'],
-              plugins: ['yo-yoify']
-            }
+            options: regularJSOptions
           },
           {
             include: [path.resolve(__dirname, 'node_modules')],