clean before build

packages/app/package.json

@@ -8,8 +8,9 @@
     "build": "run-p build:*",
     "build:client": "cross-env NODE_ENV=production webpack --config config/webpack.prod.js --profile --bail",
     "build:server": "cross-env NODE_ENV=production tsc -p tsconfig.build.server.json && tsc-alias -p tsconfig.build.server.json",
-    "prebuild": "run-p resources:*",
-    "postbuild": "npx shx mv transpiled/src dist && npx shx rm -r transpiled",
+    "clean": "npx shx rm -rf dist transpiled",
+    "prebuild": "run-p clean resources:*",
+    "postbuild": "npx shx mv transpiled/src dist && npx shx rm -rf transpiled",
     "server": "cross-env NODE_ENV=production node -r dotenv-flow/config --expose_gc dist/server/app.js",
     "server:ci": "yarn server --ci",
     "preserver": "yarn migrate",