ci(tools): use podman for building container images (#1290) (#1291)

Signed-off-by: Thuan Vo <[email protected]>
(cherry picked from commit f366d4b)

Co-authored-by: Thuan Vo <[email protected]>

Author: mergify[bot]

.github/workflows/pr-ci.yml

@@ -9,6 +9,10 @@ on:
     types:
       - created
 
+env:
+  OPENSUSE_UNOFFICIAL_LIBCONTAINERS_KEY_URL: "https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/unstable/xUbuntu_22.04/Release.key"
+  OPENSUSE_UNOFFICIAL_LIBCONTAINERS_SOURCE_URL: "https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/unstable/xUbuntu_22.04"
+
 jobs:
   check-before-build:
     runs-on: ubuntu-latest
@@ -85,6 +89,16 @@ jobs:
         java-version: '17'
         distribution: 'adopt'
         cache: maven
+    - name: Install podman v4
+      run: |
+        echo "deb $OPENSUSE_UNOFFICIAL_LIBCONTAINERS_SOURCE_URL/ /" | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:unstable.list
+        curl -fsSL $OPENSUSE_UNOFFICIAL_LIBCONTAINERS_KEY_URL | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/devel_kubic_libcontainers_unstable.gpg > /dev/null
+        sudo apt -y purge podman
+        sudo apt update && sudo apt -y install podman
+    - name: Start Podman API
+      run: systemctl --user enable --now podman.socket
+    - name: Set DOCKER_HOST environment variable
+      run: echo "DOCKER_HOST=unix:///run/user/$(id -u)/podman/podman.sock" >> "$GITHUB_ENV"
     - name: Build Cryostat application image
       id: build-cryostat-image
       run: |
@@ -102,8 +116,6 @@ jobs:
           -Dquarkus.container-image.tag=pr-${{ env.PR_num }}-${{ env.head_sha }} \
           clean package
         podman images
-        docker images
-        podman pull docker-daemon:ghcr.io/${{ github.repository_owner }}/cryostat-web:pr-${{ env.PR_num }}-${{ env.head_sha }}
     - name: Push PR test image to ghcr.io
       id: push-to-ghcr
       uses: redhat-actions/push-to-registry@v2