adds render services env to show environmental variables

[Eunoia]

First time user, first time pull request opener.

Was checking out render, and I'm very pleased with how easier it was to get a new rails app up and running.

Part of my workflow is copying data from my local postgresql database to the production database using using pgsync. To avoid committing my DATABASE_URL in a config file, I was hoping to use a command line tool to pull the url from the app, like in eb printenv, or heroku config. Seeing none, I added this to the render-cli project.

Other people are interested in this too, AleksaButterfly and Robby Helms have asked about this feature.

The interface isn't the same as heroku config, but this is better than the current solution. I'm happy to reimplement heroku config if that's the requirement.

Demo

$ deno task run services env --id srv-<redacted>                                                                                                                 
Task run deno run --unstable --allow-read --allow-net --allow-run --allow-write --allow-env -- entry-point.ts "services" "env" "--id" "srv-<redacted>"
key              value
RAILS_MASTER_KEY <redacted>
DATABASE_URL     <redacted>

On merging

When starting on this project, I was getting this error when installing dependencies:

error: The source code is invalid, as it does not match the expected hash in the lock file. Specifier: https://esm.sh/v86/ajv-formats@2.1.1

I was able to fix with deno cache --lock=deps-lock.json deps.ts --lock-write, but this updated many packages, which may be bad. However, the build was able to pass, and that's pretty good. I'm not sure what the fix here is, but I'm happy to run the proper commands before this gets merged. Alternatively, feel free to edit this PR before merging it.

[robdimarco-render]

This looks great! Thanks for doing it. Code looks good and I'd like to get it in.

I just pushed up #61 to fix the dependencies issue. Once that is merged, maybe we can modify this to just have the necessary JS changes to add the feature (I'd like to keep the PRs distinct).

[JaredShay]

Was this work ever merged into the main branch? I'm also interested in the functionality it adds