DAGSTER_CURRENT_IMAGE can be used for code location

From Dagster documentation

When running your own gRPC server within a container, you can tell the webserver that any runs launched from a code location should be launched in a container with that same image.

To do this, set the DAGSTER_CURRENT_IMAGE environment variable to the name of the image before starting the server. After setting this environment variable for your server, the image should be listed alongside the code location on the Status page in the UI.

This release allow to use the meta block to specify the Docker image for the job

initial version of dagster-nomad

v0.0.1

initial version of dagster-nomad