better deploy script

Author: lmammino

.circleci/config.yml

@@ -18,13 +18,13 @@ jobs:
       - run:
           name: Deploy
           command: >
-            if [ $CIRCLE_BRANCH = 'master' ]
+            if [ "$CIRCLE_BRANCH" = 'master' ]
             then
-              export AWS_DEFAULT_REGION=eu-west-1
+            export AWS_DEFAULT_REGION="eu-west-1"
               aws s3 sync dist s3://fullstackbulletin.com;
               aws configure set preview.cloudfront true;
-              aws cloudfront create-invalidation --distribution-id $CLOUDFRONT_DISTRIBUTION_ID --invalidation-batch "{ \"Paths\": { \"Quantity\": 1, \"Items\": [ \"/*\" ] }, \"CallerReference\": \"CIRCLE-CI-BUILD-$CIRCLE_BUILD_NUM-$CIRCLE_SHA1\" }";
-            fi
+              aws cloudfront create-invalidation --distribution-id "$CLOUDFRONT_DISTRIBUTION_ID" --invalidation-batch "{ \"Paths\": { \"Quantity\": 1, \"Items\": [ \"/*\" ] }, \"CallerReference\": \"CIRCLE-CI-BUILD-$CIRCLE_BUILD_NUM-$CIRCLE_SHA1\" }";
+            fi;
 
 workflows:
   build: