Refactor: move the application directory up a level

[thekaveman]

Part of #2153

Related to:

• https://github.com/cal-itp/docker-python-web/pull/42
• https://github.com/cal-itp/eligibility-server/pull/463

This PR should be merged after the one in docker-python-web.

From that PR's description:

There are two directories with application code:

• run/ is created by this image and contains the default nginx and gunicorn configuration
• app/ is created by the consuming image (benefits or eligibility-server) and contains the application code

This image defines these two directories under /home/calitp/ (the Docker $USERs home).

This PR moves them to the top-level /calitp/ (again, from the Docker $USER).

This change is part of addressing #2153. When we enable the setting WEBSITES_ENABLE_APP_SERVICE_STORAGE=true, /home will be a directory managed by the Azure App Service, so we need the application code out of that directory.

Testing locally

Build the benefits_client, ensuring the docker-python-web digest SHA matches the expected digest SHA: sha256:c937ae01afebab96473045c3a0f3aa9c3a28609d1ff33d756740d2eea254c61f

$ bin/build.sh
=> [client internal] load build definition from Dockerfile                                                                                                              0.0s
 => => transferring dockerfile: xxxB
=> [client internal] load metadata for ghcr.io/cal-itp/docker-python-web:main
...
=> [client  1/10] FROM ghcr.io/cal-itp/docker-python-web:main@sha256:c937ae01afebab96473045c3a0f3aa9c3a28609d1ff33d756740d2eea254c61f
...
=> [client] exporting to image
 => => exporting layers
 => => writing image sha256:xxx
 => => naming to docker.io/library/benefits_client:latest

And restart the devcontainer in VS Code. Then run the app as normal with F5.

[github-actions[bot]]

Coverage report

This PR does not seem to contain any modification to coverable code.

[thekaveman]

Front-end tests are failing because they build a container with these changes against docker-python-web:main, without the changes from cal-itp/docker-python-web/pull/42

[thekaveman]

terraform plan indicates the expected changes to the storage_account reflecting that the mount location changed from /home/calitp/app/data to /calitp/app/data.

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # azurerm_linux_web_app.main will be updated in-place
  ~ resource "azurerm_linux_web_app" "main" {
        id                                 = "/subscriptions/xxx/resourceGroups/RG-CDT-PUB-VIP-CALITP-D-001/providers/Microsoft.Web/sites/AS-CDT-PUB-VIP-CALITP-D-001"
        name                               = "AS-CDT-PUB-VIP-CALITP-D-001"
        tags                               = { ... }
        # (21 unchanged attributes hidden)

      - storage_account {
          # At least one attribute in this block is (or was) sensitive,
          # so its contents will not be displayed.
        }
      + storage_account {
          # At least one attribute in this block is (or was) sensitive,
          # so its contents will not be displayed.
        }

        # (4 unchanged blocks hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.