fix: replace reference to missing env in docker-compose/traefik

[fspoettel]

Change Summary

The traefik docker-compose.yml references an env variable CLOUDFLARE_TOKEN that does not exist in the corresponding env file:

https://github.com/nocodb/nocodb/blob/develop/docker-compose/traefik/docker-compose.yml#L65

https://github.com/nocodb/nocodb/blob/develop/docker-compose/traefik/.env#L3

This PR replaces it with the correct env. I chose to update the compose file instead of the env file because the CF_DNS_API_TOKEN name is easier to google in order to figure out permissions needed for the token.

Change type

• feat: (new feature for the user, not a new feature for build script)
• fix: (bug fix for the user, not a fix to a build script)
• docs: (changes to the documentation)
• style: (formatting, missing semi colons, etc; no production code change)
• refactor: (refactoring production code, eg. renaming a variable)
• test: (adding missing tests, refactoring tests; no production code change)
• chore: (updating grunt tasks etc; no production code change)

Test/ Verification

docker compose up should result in traefik being able to acquire an SSL cert.

Additional information / screenshots (optional)

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