GLMakie with github CI

General Usage
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Hi new Julia user here, hoping this is the right community to help answer my question.

I’m having issues with GLMakie and my github CI yaml. I’m aware there’s a bit of discussion about this elsewhere online, but haven’t been able to get the existing solutions to work for me. I’ve copied my CI.yml at the bottom.

When I push it up to gh, I get

...
✗ GLMakie
  344 dependencies successfully precompiled in 256 seconds
  2 dependencies errored. To see a full report either run `import Pkg; Pkg.precompile()` or load the packages
Run # The Julia command that will be executed
┌ Warning:     OpenGL/GLFW wasn't loaded correctly or couldn't be initialized.
│     This likely means, you're on a headless server without having OpenGL support setup correctly.
│     Have a look at the troubleshooting section in the readme:
│     https://github.com/MakieOrg/Makie.jl/tree/master/GLMakie#troubleshooting-opengl.
└ @ GLMakie ~/.julia/packages/GLMakie/F1fQC/src/gl_backend.jl:4
ERROR: LoadError: InitError: Exception[GLFW.GLFWError(GLFW.PLATFORM_ERROR, "X11: The DISPLAY environment variable is missing"), ErrorException("glfwInit failed")]

I’ve followed the suggested link and tried to incorporate the changes there, but haven’t been able to make it work.
I’ve tried adding DISPLAY=:0 xvfb-run -s '-screen 0 1024x768x24' in front of any julia calls, as well as sudo apt-get update && sudo apt-get install -y xorg-dev mesa-utils xvfb libgl1 freeglut3-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-d ev libxext-dev xsettingsd x11-xserver-utils before uses commands that run julia-actions. I’m also new to github CI, so that could be part of the problem.

My CI.yml:

name: CI
 on:
   push:
     branches:
       - main
     tags: ['*']
   pull_request:
 concurrency:
   # Skip intermediate builds: always.
   # Cancel intermediate builds: only if it is a pull request build.
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 jobs:
   docs:
     name: Documentation
     runs-on: ubuntu-latest
     permissions:
       contents: write
       statuses: write
     steps:
       - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1' 
       - run: sudo apt-get update && sudo apt-get install -y xorg-dev mesa-utils xvfb libgl1 freeglut3-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-d
       - name: Configure doc environment
         run: |
           DISPLAY=:0 xvfb-run -s '-screen 0 1024x768x24' julia --color=yes --project=docs/ -e '
             using Pkg
             Pkg.develop(PackageSpec(path=pwd()))
             Pkg.instantiate()' && echo "TESTS_SUCCESSFUL=true" >> $GITHUB_ENV
       - uses: julia-actions/julia-buildpkg@v1
       - name: Install Julia dependencies
         shell: julia --project=docs/ {0} 
         run: |
           DISPLAY=:0 xvfb-run -s '-screen 0 1024x768x24' julia --color=yes --project=docs/ -e '
           using Pkg;
           # dev mono repo versions
           pkg"dev . ./MakieCore ./GLMakie"' # ./ReferenceTests"
       - uses: julia-actions/julia-docdeploy@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Run Doctest
         run: |
           DISPLAY=:0 xvfb-run -s '-screen 0 1024x768x24' julia --project=docs -e '
             using Documenter: DocMeta, doctest
             using Jems
             DocMeta.setdocmeta!(Jems, :DocTestSetup, :(using Jems); recursive=true)
             doctest(Jems)' && echo "TESTS_SUCCESSFUL=true" >> $GITHUB_ENV

Does anyone know what I’m missing?