Build the /e/OS rom with custom app

i want to build /e/OS rom with a prebuilt apk. should i just add -e "CUSTOM_APPS= myApk.apk" to docker build command? and how can i do this if i want to build rom without docker.
what other build options do we have except CUSTOM_APPS and MINIMAL_APPS?

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You could start with this method [HOWTO] build /e/ the (full) classic way (no docker, no scripts, just 'make'), an extension to this which simplifies the addition of apps is Setup · sfX-android/android_vendor_extendrom Wiki · GitHub.