Add before-pack script and installer configuration for NSIS

package.json

@@ -34,6 +34,7 @@
     "dist:mac": "npm run build && npm run rebuild:native && electron-builder --mac"
   },
   "build": {
+    "beforePack": "./scripts/before-pack.mjs",
     "appId": "com.scoreko.desktop",
     "productName": "Scoreko",
     "artifactName": "${productName}-${version}-${os}-${arch}.${ext}",
@@ -81,6 +82,7 @@
       "signAndEditExecutable": true
     },
     "nsis": {
+      "include": "static/installer.nsh",
       "oneClick": false,
       "allowToChangeInstallationDirectory": true,
       "artifactName": "${productName}-setup-${version}.${ext}",