feat: convert wav by ffmpeg

package.json

@@ -5,7 +5,6 @@
   "main": "dist/main.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "postinstall": "cross-env ELECTRON_SKIP_BINARY_DOWNLOAD=1 && npm install electron --no-save",
     "build": "npm run build-main && npm run build-preload && npm run build-renderer",
     "build-main": "webpack --config webpack.main.config.js",
     "build-preload": "webpack --config webpack.preload.config.js",
@@ -19,6 +18,7 @@
   "license": "ISC",
   "dependencies": {
     "express": "^4.18.2",
+    "fluent-ffmpeg": "^2.1.2",
     "json-bigint": "^1.0.0",
     "music-metadata": "^8.1.4",
     "silk-wasm": "^3.2.3",
@@ -28,12 +28,14 @@
   "devDependencies": {
     "@babel/preset-env": "^7.23.2",
     "@types/express": "^4.17.20",
+    "@types/fluent-ffmpeg": "^2.1.24",
     "@types/node": "^20.11.19",
     "@types/uuid": "^9.0.8",
     "@types/ws": "^8.5.10",
     "babel-loader": "^9.1.3",
     "copy-webpack-plugin": "^12.0.2",
     "cross-env": "^7.0.3",
+    "electron": "^29.0.1",
     "ts-loader": "^9.5.0",
     "typescript": "^5.2.2",
     "webpack": "^5.89.0",