Change build date to iso8601 format

Close #6 (closed)

.gitlab-ci.yml

@@ -31,7 +31,7 @@ prep-deploy:
   environment:
     name: $TARGET_ENV
   script:
-    - export BUILD_DATE=$(TZ=America/Chicago date --iso-8601=seconds)
+    - export BUILD_DATE=$(TZ=America/Chicago date +%Y-%m-%dT%H%M%S)
     - |
       if [ "$TARGET_ENV" = "dev" ]; then
            TF_VAR_data_volume="xdmod-dev-volume-$BUILD_DATE"