Server render the main page

Also, add hashes to asset file names and use the "entry manifest" plugin
in dev to get auto-reloading.

modules/client/.babelrc

@@ -1,4 +1,9 @@
 {
-  "presets": [["@babel/env", { "loose": true }], "@babel/react"],
-  "plugins": [["@babel/plugin-proposal-class-properties", { "loose": true }]]
+  "presets": [
+    ["@babel/env", { "loose": true }],
+    "@babel/react"
+  ],
+  "plugins": [
+    ["@babel/plugin-proposal-class-properties", { "loose": true }]
+  ]
 }