Update buildenv.sh

Author: Gunasekar-K

buildenv.sh

@@ -102,3 +102,10 @@ done
 ENV_CONFIG=`echo "$ENV" | tr '[:upper:]' '[:lower:]'`
 download_buildenvfile
 uploading_buildenvvar
+
+if grep -Fxq "buildenvvar" .dockerignore
+then
+    log "buildenvvar exist in docker ignore file list"
+else
+    echo "buildenvvar" >> .dockerignore
+fi