Fileglancer Services

[krokicki]

This adds the notion of Services to Fileglancer Apps (#314). Services are cluster jobs that are started and stopped by the user as needed. They can be web servers, notebooks, APIs, etc.

• Entry points can declare type: service in runnables.yaml. These run until explicitly stopped rather than running to completion.
• Fileglancer exports SERVICE_URL_PATH as an env var in the job script. Services write their URL to a new file at SERVICE_URL_PATH. Fileglancer polls this file and when the URL is written it gets displayed in the UI for the user to access.

These services are available (or coming soon):

• There is now a service demo in the demo app: https://github.com/JaneliaSciComp/fileglancer-demo-app
• There is also an MRC viewer app here: https://github.com/JaneliaSciComp/neuroglancer-mrc
• Marwan and I will add a service for CellMap Flow soon

Other ideas:

• Other Neuroglancer backends
• TensorBoard/MLFlow
• Remote VS Code
• Jupyter notebooks
• Dask/Spark/Ray clusters
• Local LLMs

@StephanPreibisch @JaneliaSciComp/fileglancer @mzouink