Two kinds of secrets: build-time (I need an API key to access a download needed to set up the container) and run-time (I need an API key to talk to the database

Two kinds of secrets: build-time (I need an API key to access a download needed to set up the container) and run-time (I need an API key to talk to the database). The post argues against using ENV for build-time secrets, but it's still recommended for run-time secrets. Sibling comments address alternatives for getting build-time secrets in.