[MAINT] Prevent workers from trying to parse sys.argv upon intialization

[peytondmurray]

Fixes #849.

Description

CondaStoreWorker instances subclass traitlets.Application. traitlets can parse sys.argv to set configuration variables for the application. In certain situations e.g. running pytest -svv, the worker initializes and immediately tries to parse -svv as a traitlets configuration variable, which of course does not exist.

This PR fixes the conda_store_config fixture, which incorrectly manipulates sys.argv, and inadvertently allows pytest args to get parsed as traitlets configuration settings.

---

Other minor change: updated the .gitignore to include conda-store-ui static files, which I missed when the privatization PR went through.

Pull request checklist

• Did you test this change locally?
• Did you update the documentation (if required)?
• Did you add/update relevant tests for this change (if required)?

How to test

Here's the original offending pytest invocation, which now works as intended:

pytest tests/test_app_api.py::test_conda_store_register_environment_workflow -svv

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[peytondmurray]

Hmm, seems like we the server gets stuck waiting for workers with this change...

conda-store-server-1  | INFO:     127.0.0.1:58590 - "GET /conda-store/api/v1/ HTTP/1.1" 200 OK
conda-store-server-1  | [CondaStoreServer] WARNING | Waiting for worker... Use --standalone if running outside of docker
conda-store-server-1  | [CondaStoreServer] WARNING | Waiting for worker... Use --standalone if running outside of docker

[peytondmurray]

Okay, it looks like we actually are passing arguments to the worker via the command line:

services:
  conda-store-worker:
    build:
      context: conda-store-server
      target: dev
    user: 1000:1000
    volumes:
      - ./tests/assets/environments:/opt/environments:ro
      - ./tests/assets/conda_store_config.py:/opt/conda_store/conda_store_config.py:ro
    depends_on:
      conda-store-server:
        condition: service_healthy
    platform: linux/amd64
    command:
      [
        "conda-store-worker",
        "--config",
        "/opt/conda_store/conda_store_config.py",
      ]

Not sure what the best path is here - we don't want traitlets to parse every argument, but we need to be able to pass some arguments (i.e. only the traitlets arguments). 🤔

[peytondmurray]

Turned out to be a bad test fixture. Fixed now!

[trallard]

Related: #594