Only deploy if NOW_TOKEN is set

bin/deploy.sh

@@ -2,6 +2,7 @@
 # Don't deploy if commit contains WIP
 set -e
 if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]; then
+  if [[ -z ${NOW_TOKEN+x} ]]; then
     if [[ $(git log -1 --pretty=%B --no-merges) != *"WIP"* ]]; then
       NOW_URL=$(now -e NODE_ENV=production --public --no-clipboard --team=dawn --token="$NOW_TOKEN")
 
@@ -10,4 +11,5 @@ if [[ "$TRAVIS_PULL_REQUEST" != "false" ]]; then
       --data "{\"text\": \":small_red_triangle: New Carbon PR Deployment for <https://github.com/dawnlabs/carbon/pulls/$TRAVIS_PULL_REQUEST|PR #$TRAVIS_PULL_REQUEST>\\n:rocket: $NOW_URL\"}" \
       "$DAWN_SLACK_WEBHOOK"
     fi
+  fi
 fi