It would be useful to have a Dockerimage to deploy QSA in a microservice environment like a docker compose setup.

Possible example:

version: "3.8"
services:
   qwa:
      image: qwa/qwa
      enviroment:
         - ENV_VAR_1=foo
         - ENV_VAR_2=bar
         - ENV_VAR_3=foobar
      volumes:
         - path/on/host/qsa.yml:/path/on/image/qsa.yml 

Ideas to consider:

• image must of course contain pyqgis, however it would be ideal to keep the image small
• is a config file really needed? maybe be all configs could also be written as envvars which would make a QSA deployment with Docker easier

Thanks for the project. It looks really promising. I would like to try it, but I fail to install it. So far I did:

poetry install

I do not find a way to run qsa qsa.yml. Maybe I am missing a simple step here (since I am currently not that deep into Python)

Could you provide some hints how to get QSA running?

This more a question, because maybe this functionality already exists.

Is it possible to add a layer of a PostGIS database to a QGIS Project?

QGIS Projects are often stored in a PostGIS database. That's why it would be great if QSA could access them as well.
a possible config file could look like:

qgisserver:
    url: "http://qgisserver/ogc/"
    projects: "postgresql://username:password@host:port/dbname"  # PostgresSQL connection string

The table where the QGIS projects live must be called qgis_projects and can exist in multiple schemas. This means to reference a QGIS project one must provide the name of the project and also its schema.

The current way to call a project would not work anymore:

• current way to call a project: [GET] /api/projects/<project_name>/layers
• possible ways for project in different Postgres schemas:
  • via query param: [GET] /api/projects/<project_name>/layers?schema=<schema_name> (default should be public)
  • add a new param in the URL: [GET] /api/<schema_name>/projects/<project_name>/layers but this would interfere with the current way of the API ...

Currently it seems the QSA expects to be MapProxy installed in the QGIS Server setup as well. However, not every setup uses MapProxy. That's why it would be great to make the usage of MapProxy optional.