Create custom eoAPI runtime

[pantierra]

Build a custom stac service runtime for EOEPCA.

• Create dockerfile to build runtime.
• Upload to registry (idelally using harbor) via CI.
• Adjust k8s to deploy container for eoAPI.
• Ensure end-to-end automatic deployment on container definition changes.

This is a precondition for:

• the whole STAC API transaction topic:
  • Implementing Transaction API and Auth developmentseed/eoapi-k8s#33
  • Provide REST API for CRUD operations in eoAPI resource-discovery#90
  • Turn STAC Transaction API endpoints on again resource-discovery#99
• Add provider for dynamic tiles for Xarray-read data formats to Data Access BB #95

[pantierra]

Short status update:

• the custom runtime for the STAC component of eoAPI builds now from this repository and pushes it to eoepca's container registry.
• ArgoCD in eoepca-plus pulls now from this registry and deploys it.

Missing, ensure that the whole pipeline works on its own on changes to the container definition.

[pantierra]

Deployed yesterday some changes to it in order to make the first alpha of STAC manager work. The custom runtime works.