Add support for building a Windows self-contained executable

electron-builder.json

@@ -0,0 +1,10 @@
+{
+    "directories": {
+        "app": "dist",
+        "output": "app-builds"
+    },
+    "win": {
+        "icon": "dist/favicon",
+        "target": ["portable"]
+    }
+}

package.json

@@ -63,6 +63,7 @@
     "css-loader": "0.28.7",
     "cssnano": "3.10.0",
     "electron": "1.7.8",
+    "electron-builder": "^19.45.4",
     "electron-packager": "9.1.0",
     "electron-reload": "1.2.1",
     "exports-loader": "0.6.4",