The dokku CLI provides config subcommands for managing environment variables
for the target container.
An env var can be set for an active container with config:set:
$ dokku config:set app-name JEMALLOC_ENABLED=true MALLOC_CONF="stats_print:true"Notice I'm able to set multiple env vars at once if needed.
If I ever need to check what an env var is currently set to for one of my app
containers, I can use config:get:
$ dokku config:get app-name JEMALLOC_ENABLED
trueI can always override any value with another config:set. However, if I need to
entirely remove the env var, I can use config:unset:
$ dokku config:unset app-name MALLOC_CONF