Merge pull request #1240 from thelounge/astorije/better-run_pr-script

Improve the PR tester script a bit

scripts/run-pr.sh

@@ -9,7 +9,8 @@ fi
 
 git fetch https://github.com/thelounge/lounge.git refs/pull/${1}/head
 git checkout FETCH_HEAD
+git rebase master
 npm install
-npm run build
+NODE_ENV=production npm run build
 npm test || true
 npm start