`quarto publish connect` - invalid peer certificate error

Start by reproducing quarto publish connect --server https://myserver.com against a Connect server using the reported certificate setup, and compare its request to the working curl call for /__api__/v1/user. Done means the command accepts the certificate, prompts for the API key, and publishes successfully on the reported environments.

Bug description

Received "invalid peer certificate: UnknownIssuer" error when trying to publish quarto site to connect server.

Steps to reproduce

I am encountering the same issue as #3363 trying to publish a Quarto website to our Posit Connect server. The quarto website builds successfully locally, and I can publish via the button in RStudio without issue. However, running quarto publish connect --server https://myserver.com and entering my API key results in the error:

ERROR: TypeError: error sending request for url (https://myserver.com/__api__/v1/user): error trying to connect: invalid peer certificate: UnknownIssuer

This worked when our server was http, before adding certs. When I do the curl command curl -H "Authorization: Key $API_KEY" https://myserver.com/__api__/v1/content, I get a valid response. I've also checked that my certificate for the site is Always Trusted (on Mac, done in keychain access).

Expected behavior

quarto publish connect --server https://myserver.com should prompt for an API key and then publish.

Actual behavior

quarto publish connect --server https://myserver.com and entering my API key results in the error:

ERROR: TypeError: error sending request for url (https://myserver.com/__api__/v1/user): error trying to connect: invalid peer certificate: UnknownIssuer

Your environment

Quarto: version 1.5.54
OS: macOS 14.6.1 / Darwin 23.6.0 (my coworker on Windows also reproduced this issue)
Connect version: 2024.03.0

Quarto check output

Quarto 1.5.54
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.2.0: OK
      Dart Sass version 1.70.0: OK
      Deno version 1.41.0: OK
      Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.5.54
      Path: /Users/mgipson1/Applications/quarto/bin

[✓] Checking tools....................OK
      TinyTeX: (not installed)
      Chromium: (not installed)

[✓] Checking LaTeX....................OK
      Tex:  (not detected)

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.10.1
      Path: /Users/mgipson1/.pyenv/versions/3.10.1/bin/python3
      Jupyter: 5.7.2
      Kernels: projectname, ochco-edp-etl-venv, python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........OK
      Version: 4.4.1
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Users/mgipson1/github-repositories/pa-knowledge-base/renv/library/macos/R-4.4/x86_64-apple-darwin20
        - /Users/mgipson1/Library/Caches/org.R-project.R/R/renv/sandbox/macos/R-4.4/x86_64-apple-darwin20/2edc1867
      knitr: 1.48
      rmarkdown: 2.28

[✓] Checking Knitr engine render......OK