I'm building a Leptos app deployed as an AWS Lambda, so I need to specify an environment variable for cargo lambda build for it to build the server side with the right data. I was hoping I could specify environment variables in a configuration file instead of setting it every time cargo lambda build is called, but looks like it is not supported. Can we add support for it so we can specify it in CargoLambda.toml:

[build]
env_var = [
    "LEPTOS_OUTPUT_NAME=appname",
]