Passing parameters to Lean CLI

QC Launcher allows passing parameters as arguments to the executable like below:

QuantConnect.Lean.Launcher.exe --parameters "ema-slow:1,ema-fast:10"

With Lean CLI I know we can modify config.js to add parameters, but I want to run multiple instances of lean with different parameters.

Is it possible to pass parameters to Lean CLI in the command line similar to Launcher.exe?

How about passing environment variables to the docker container?

Another question: Does config.js in a Lean project replace the default config, or does it add/merge on top of the default config?

Thanks!

"Is it possible to pass parameters to Lean CLI in the command line similar to Launcher.exe?"
No, there is nothing similar to the `--parameters` option on QuantConnect.Lean.Launcher.exe. However, you may be able to use the optimizer to run backtests on a range of parameters.

“How about passing environment variables to the docker container?”
There's no built-in feature for this. You can set custom environment variables if you use custom Docker images, but keep in mind that this requires you to manually keep your custom images up-to-date, and that you need at least basic Docker knowledge to make this work.

"Does config.js in a Lean project replace the default config, or does it add/merge on top of the default config?"
The config.json file in each project created by the CLI contains project-specific configuration. When you run LEAN using the CLI, the CLI takes the project description and parameters from the config.json file, the general LEAN configuration from the lean.json file in the directory you ran `lean init` in, and adds some extra properties automatically (like environment, job-user-id, api-access-token, etc., it's implemented here).

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