build: add deploy sh

build/gh-pages-deploy.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+directory=_site
+branch=gh-pages
+
+echo -e "\033[0;32mDeleting old content...\033[0m"
+rm -rf $directory
+
+echo -e "\033[0;32mChecking out $branch....\033[0m"
+git worktree add $directory $branch
+
+echo -e "\033[0;32mGenerating site...\033[0m"
+npm run deploy:build
+
+echo -e "\033[0;32mDeploying $branch branch...\033[0m"
+cd $directory &&
+  git add --all &&
+  git commit -m "Deploy updates" &&
+  git push origin $branch
+
+echo -e "\033[0;32mCleaning up...\033[0m"
+cd ../
+git worktree remove $directory