Use github ssh auth when deploying

Author: watson

scripts/deploy.sh

@@ -12,12 +12,12 @@ BUILD_FOLDER=".build"
 rm -rf "$BUILD_FOLDER"
 
 # Checkout the current repo
-git clone -b master https://$GITHUB_USER:$GITHUB_PERSONAL_ACCESS_TOKEN@github.com/nodeschool/nodeschool.github.io.git .build
+git clone -b master git@github.com:nodeschool/nodeschool.github.io.git .build
 
 npm run build
 
 cd .build
 git checkout master
 git add . --force
 git commit -m "Automatic deployment of $(git rev-parse HEAD)"
-git push origin master
+git push origin master