Cleanup unused deployment secrets & args (#2698)

## Description:

* Remove unused otel creds
* Remove unused R2 creds
* remove left-over BASIC_AUTH
* Generate an admin token on startup
* Removed kick_player since lobby creators already have ability to kick
player

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

example.env

@@ -6,19 +6,11 @@ GHCR_USERNAME=username
 GHCR_REPO=your-repo-name
 GHCR_TOKEN=your_docker_token_here
 
-# Admin credentials
-ADMIN_TOKEN=your_admin_token_here
-
 # Cloudflare Configuration
 CF_ACCOUNT_ID=your_cloudflare_account_id
 CF_API_TOKEN=your_cloudflare_api_token
 DOMAIN=your-domain.com
 
-# R2 Configuration
-R2_ACCESS_KEY=your_r2_access_key
-R2_SECRET_KEY=your_r2_secret_key
-R2_BUCKET=your-bucket-name
-
 # API Key
 API_KEY=your_api_key_here