version is not shown correctly

## Problem Description

Version is not shown correctly when running the app, for instance:

### What is actually happening

```cucumber
Given the docker image ghcr.io/github/safe-settings:2.1.0
When I run docker run --rm -ti ghcr.io/github/safe-settings:2.1.0
Then I see safe-settings@0.1.0-rc.26 start
```

```cucumber
Given the docker image ghcr.io/github/safe-settings:2.1.0
When I run docker inspect ghcr.io/github/safe-settings:2.1.0 | jq -r '.[0].Config.Labels'
Then I see "version": "1.0"
```

### What is the expected behavior

To show `safe-settings@2.1.0 start` and `version: 2.1.0`

### Error output, if available

## Context

### Are you using the hosted instance of probot/settings or running your own?

### If running your own instance, are you using it with github.com or GitHub Enterprise?

#### Version of probot/settings

#### Version of GitHub Enterprise

Start by reproducing the discrepancy with `docker run --rm -ti ghcr.io/github/safe-settings:2.1.0` and inspect the image metadata with `docker inspect ... | jq`. Trace where the startup version and image label values come from. Done means both report 2.1.0 for the 2.1.0 image.

Written by the indexing model from the issue text.