Enhancement, transform the output to several single flag expressions, in one line

[leobm]

Something that sometimes can also be useful.
You may have seen in the Makefile "demo-convert" that I transform the output again. So that one has e.g. the following format -e [ENV_NAME1]=[ENV_VALUE1] -e [ENV_NAME2]=[ENV_VALUE2].....

Various tools can also be passed environment variables as individual flags. E.g. also docker run:
https://docs.docker.com/engine/reference/commandline/run/#set-environment-variables--e---env---env-file

Once you can pass a .env file directly or you can pass each environment variable using the -e flag.
What would be cool, if I could create this output already directly via a switch with your envrun tool. E.g. a flag --flag-ouput-name or so.
But maybe that's already too much for a simple tool, it was just an idea that came to me today. Just forget it if you don't think it makes sense.

Best,
Felix