clean before build

Author: Matthias Rütten

package.json

@@ -6,17 +6,18 @@
   "scripts": {
     "build-main": "cross-env NODE_ENV=production webpack --config webpack.main.prod.config.js",
     "build-renderer": "cross-env NODE_ENV=production webpack --config webpack.renderer.prod.config.js",
-    "build": "npm run build-main && npm run build-renderer",
+    "build": "yarn clean && yarn build-main && yarn build-renderer",
+    "clean": "rm -rf dist && rm -rf release",
     "start-renderer-dev": "webpack-dev-server --config webpack.renderer.dev.config.js",
     "start-main-dev": "webpack --config webpack.main.config.js && electron ./dist/main.js",
-    "start": "cross-env START_HOT=1 npm run start-renderer-dev",
-    "prestart": "npm run build",
+    "start": "cross-env START_HOT=1 yarn start-renderer-dev",
+    "prestart": "yarn build",
     "lint": "tslint '{src,test,mocks}/**/*.{ts,tsx}' --project ./tsconfig.json",
     "test": "jest '(\\/test\\/(?<!e2e/)).*'",
-    "pretest:e2e": "npm run build",
+    "pretest:e2e": "yarn build",
     "test:e2e": "jest '(\\/test\\/e2e/).*'",
-    "pack": "npm run build && electron-builder --dir",
-    "dist": "npm run build && electron-builder --publish never",
+    "pack": "yarn build && electron-builder --dir",
+    "dist": "yarn build && electron-builder --publish never",
     "postinstall": "electron-builder install-app-deps",
     "prettier:check": "prettier --check 'src/**/*.ts*'",
     "prettier:write": "prettier --write 'src/**/*.ts*'"