Docker wont start?

I had a working set up for about 2 years. Then thought it would be good to upgrade to 18.04 from 16.04. Terrible idea. Now my container launches but it isn’t reading the config file. I can console into the container and can see the files in their correct /config/ location.

I’ve tried changing the volume location and reducing the config file to just the homeassistant base config, no dice.

2019-01-09 06:40:28 ERROR (MainThread) [homeassistant.bootstrap] Error loading /config/configuration.yaml: Secret latitude not defined
2019-01-09 06:40:28 INFO (MainThread) [homeassistant.core] Starting Home Assistant
2019-01-09 06:40:28 INFO (MainThread) [homeassistant.core] Timer:starting

I think the error message is quite self explanatory tbh.

Your configuration has a secret called latitude, your secrets.yaml does not contain a corresponding entry.