make Docker container executable

[bgruening]

This makes the Docker container runnable for me.

However, with just a OPENAI_API_KEY or no LLM key at all and just Galxy creds Loom is refusing to start and hints me too:

[app         ] Set up one of the following:
[app         ]   1. Config file (recommended):
[app         ]      Create ~/.loom/config.json:
[app         ]      {
[app         ]        "llm": {
[app         ]          "active": "anthropic",
[app         ]          "providers": {
[app         ]            "anthropic": { "apiKey": "sk-ant-..." }
[app         ]          }
[app         ]        }
[app         ]      }
[app         ]   2. Environment variable:
[app         ]      export ANTHROPIC_API_KEY=sk-ant-...
[app         ]      export OPENAI_API_KEY=sk-...
[app         ]   3. Custom provider (~/.pi/agent/models.json):
[app         ]      For local/self-hosted models via litellm, ollama, etc.
[app         ]      See: https://github.com/galaxyproject/loom#local-llms
[app         ]   4. OAuth login:
[app         ]      Run with --provider anthropic (or openai, google, etc.)
[app         ]      and follow the login prompts.


For reference this is how I start the container:

> docker run -i -t --rm -e GALAXY_API_KEY=hgddddddd -e GALAXY_URL=https://usegalaxy.eu -e LOOM_WEB_ALLOW_INSECURE=1 -e OPENAI_API_KEY=owkkA  -p 3000:3000 quay.io/galaxy/loom:0.5  

[dannon]

Thank you so much!