switching from dev to live - with extensions

Hi, I have been building my own CKAN instance with docker-ckan as my base and on dev it works well, but when I switch to run with the live file the extensions aren't being picked up - i think thought this was down to ckan-base not having the "ENV SRC_EXTENSIONS_DIR=/srv/app/src_extensions" line but i am told this is not the case.

Any help on how I can get live to see my extensions?