Attempt to use custom image for podman building

.github/workflows/build.yml

@@ -18,7 +18,7 @@ on:
 jobs:
   bluebuild:
     name: Build Custom Image
-    runs-on: ubuntu-22.04
+    runs-on: rocky-minimal
     permissions:
       contents: read
       packages: write
@@ -32,27 +32,6 @@ jobs:
       # so it's best to remove unneeded softawre
       - name: Maximize build space
         uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be # v1.3.1
-
-      - name: Get Ubuntu version
-        id: ubuntu_version
-        shell: bash
-        run: |
-          VERSION=$(awk -F= '/^VERSION_ID=/ {gsub(/"/, "", $2); print $2}' /etc/os-release)
-          echo "Ubuntu version is $VERSION"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-      
-      # that is compatible with BlueBuild
-      - name: Setup Podman
-        shell: bash
-        run: |
-          # from https://askubuntu.com/questions/1414446/whats-the-recommended-way-of-installing-podman-4-in-ubuntu-22-04
-          ubuntu_version='22.04'
-          key_url="https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/unstable/xUbuntu_${ubuntu_version}/Release.key"
-          sources_url="https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/unstable/xUbuntu_${ubuntu_version}"
-          echo "deb $sources_url/ /" | sudo tee /etc/apt/sources.list.d/devel-kubic-libcontainers-unstable.list
-          curl -fsSL $key_url | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/devel_kubic_libcontainers_unstable.gpg > /dev/null
-          sudo apt-get update
-          sudo apt-get install -y podman
       
       - uses: sigstore/cosign-installer@v3.9.0
         with: