Is there an ENV variable with the Lucee 6 Docker images where I can specify the JVM size or is there a config file I can load to overwrite the default. Googling and searching docs is not leading me in the right direction. I am not using commandbox.

You may be able to use JVM args eg: -Xms sets the initial heap size for the JVM. -Xmx sets the maximum heap size for the JVM.

As per the docs: https://hub.docker.com/r/lucee/lucee

LUCEE_JAVA_OPTS

Great thanks. Missed it.