Can't curl public url on onrender.com to check for website health

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

This is the url of the failure: https://github.com/TechWatchProject/kumquat/actions/runs/7934999258/job/21667193674

This job yml file reproduces the issue:

name: Test

on:  [push, pull_request]

jobs:
  build:
    name: Test
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Update CA certificates
        run: |
          sudo apt-get update
          sudo apt-get install -y ca-certificates

      - name: dig prod.kumquat.link
        run: |
            dig prod.kumquat.link

      - name: dig test2.kumquat.link
        run: |
            dig test2.kumquat.link

      - name: Production Site is up
        run: |
          output=$(curl -L https://kumquat-prod.onrender.com)
          echo "$output" | grep "Home Page"
      - name: Test Site is up
        run: |
          output=$(curl -L kumquat-test.onrender.com)
          echo "$output" | grep "About Page"

The "Update CA certificates" step may be optional. I was adding it as part of my debugging process.

Expected behavior

This curl command succeeds locally. The actual public URL is prod.kumquat.link and test2.kumquat.link. But neither this nor the onrender URL that prod/test2.kumqual.ink CNAMES to is succeeding on the github runner.

Runner Version and Platform

Version of your runner?

ubuntu-latest

OS of the machine running the runner? OSX/Windows/Linux/...

ubuntu-latest

What's not working?

Please include error messages and screenshots.

Job Log Output

output=$(curl -L kumquat-test.onrender.com)
  echo "$output" | grep "About Page"
  shell: /usr/bin/bash -e {0}
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100    69  100    69    0     0    76[3](https://github.com/TechWatchProject/kumquat/actions/runs/7934999258/job/21667193674#step:7:3)      0 --:--:-- --:--:-- --:--:--   766

100     9    0     9    0     0     1[5](https://github.com/TechWatchProject/kumquat/actions/runs/7934999258/job/21667193674#step:7:6)      0 --:--:-- --:--:-- --:--:--    15
100     [9](https://github.com/TechWatchProject/kumquat/actions/runs/7934999258/job/21667193674#step:7:10)    0     9    0     0     15      0 --:--:-- --:--:-- --:--:--     0
Error: Process completed with exit code 1.

actions / runner