Environment variables as placeholders

[cascandaliato]

I'm using minmon through Docker and some of the actions are Pushover webhooks that require API keys. I'd like to keep my Pushover keys in a .env file and inject them into the container environment.

[flo-at]

That would be a good option to manage secrets. The syntax could be something like {{env:env_var_name}}.
The env. var. name should have a (configurable?) common prefix so we don't have to store all env. vars. (because that can be a lot).

[cascandaliato]

The env. var. name should have a (configurable?) common prefix

Good point. Even a non-configurable prefix like MINMON_ sounds reasonable enough to me.

Related to the use case of secrets, I would also consider allowing placeholders in a Webhook headers (possibly a different discussion/issue).

[flo-at]

Check out v0.9.0. Feel free to reopen if something is missing or not working as it should.

[cascandaliato]

Thank you for implementing my request so quickly.

I tested few cases and they all worked perfectly:

• env vars in webhook header
• env vars in webhook body
• default, custom non-empty and custom empty (i.e. import all vars) env var prefix

[flo-at]

Thanks for testing