Coder offline issues

Hello, I'm evaluating coder in our air-gapped dev environment and run into the problem that despite following https://coder.com/docs/coder-oss/latest/install/offline coder tries to install terraform on startup from the internet (which fails of course):

coder_1  | ==> Logs will stream in below (press ctrl+c to gracefully exit):
coder_1  | Unexpected error, shutting down server: install terraform: install: Get "https://releases.hashicorp.com/terraform/1.3.4/index.json": dial tcp: lookup releases.hashicorp.com on 127.0.0.11:53: no such host
coder_1  | Shutting down API server...
coder_1  | Gracefully shut down API server
coder_1  | Waiting for WebSocket connections to close...
coder_1  | Done waiting for WebSocket connections
coder_1  | install terraform: install: Get "https://releases.hashicorp.com/terraform/1.3.4/index.json": dial tcp: lookup releases.hashicorp.com on 127.0.0.11:53: no such host
coder_1  | Run 'coder server --help' for usage.                                                                                                                               
coder_coder_1 exited with code 1

How can I tell coder that terraform is already present?

Another issue is that it complains that the update check fails (of course). Is it possible to deactivate this?
Run Coder in offline / air-gapped environments
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