ConfigMap with template strings

[janisii]

Hello, I would recommend to update README.md to add information that template strings can be used in ConfigMap for Kubernetes users, because at first I could not understand how to add password to ConfigMap in secure way.

Had to dig into source code to find out, that env variables can be used as template strings.

Template string in ConfigMap {{YOUR_SQL_PASS}} should match pod env variable YOUR_SQL_PASS: "secure-password" (secret).

[dewey]

Hey, yes currently that's only "documented" in the example config file. Happy to merge an addition to the README if someone wants to do that.