Revert build changes

.github/workflows/docker-publish.yml

@@ -12,8 +12,6 @@ on:
   pull_request:
     branches: [ 'main' ]
   workflow_dispatch:
-    branches: [ '*' ]
-    tags: [ 'v*.*.*' ]
 
 env:
   REGISTRY: ghcr.io
@@ -24,21 +22,14 @@ env:
 
 jobs:
   build:
+    # Iterates through each OS using a matrix strategy
+    # See https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs
     strategy:
-      fail-fast: true
+      fail-fast: false  # setting false to work out u26 builds.
       matrix:
         os: [ 'ol8', 'el9', 'el10', 'u20', 'u22', 'u24', 'u26' ]
-        arch: [ 'amd64', 'arm64' ]
-        include:
-          # Intel Runner: Compiles native x86 AND safely triggers emulated tasks for supported OS versions
-          - arch: amd64
-            runner: ubuntu-latest
-            platforms: linux/amd64
-          - arch: arm64
-            runner: ubuntu-24.04-arm
-            platforms: linux/arm64
 
-    runs-on: ${{ matrix.runner }}
+    runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
@@ -51,19 +42,13 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Set up QEMU
-        if: matrix.arch == 'amd64'
         uses: docker/setup-qemu-action@v4
-
       - name: Setup Docker buildx
         uses: docker/setup-buildx-action@v4
         with:
-          # Automatically preserves your default execution privileges while passing parameters
-          buildkitd-flags: --allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host
-          # Tells QEMU/BuildKit to cleanly map 64-bit kernel filesystem structures down to a 32-bit layout
-          buildkitd-config-inline: |
-            [worker.containerd]
-              prefer32 = true
-
+          # This forces BuildKit to drop the 64-bit structural extensions 
+          # when extracting layers, bypassing the 32-bit emulation crash entirely.
+          buildkitd-flags: --oci-worker-snapshotter=overlayfs
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action
@@ -93,24 +78,32 @@ jobs:
       #
       # Platform Builds
       #
-      - name: Build and push images
+
+      # amd64 and arm64 -- OL, EL, Debian and Ubuntu
+
+      - name: Build and push amd64 and arm64
         id: build-and-push
+        # No condition here; build everything on these platforms.
         uses: docker/build-push-action@v7
         with:
           context: .
           file: ./docker-envs/Dockerfile-${{ matrix.os }}
-          # Dynamically builds whatever platforms are defined for this specific runner/OS match
-          platforms: >-
-            ${{ matrix.arch == 'arm64' && 'linux/arm64' || '' }}${{
-              (matrix.arch == 'amd64' && (matrix.os == 'u20' || matrix.os == 'u22' || matrix.os == 'u24'))
-              && 'linux/amd64,linux/arm/v7,linux/ppc64le'
-              || ''
-            }}${{
-              (matrix.arch == 'amd64' && (matrix.os == 'ol8' || matrix.os == 'el9' || matrix.os == 'el10' || matrix.os == 'u26'))
-              && 'linux/amd64'
-              || '' 
-            }}
+          platforms: linux/amd64, linux/arm64
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
 
+      # armv7 and ppc64le - Debian and Ubuntu
+
+      - name: Build and push armv7 and ppc64le
+        id: build-and-push-multiarch
+        if: ${{ startsWith(matrix.os, 'd') || startsWith(matrix.os, 'u') }}
+        uses: docker/build-push-action@v7
+        with:
+          context: .
+          file: ./docker-envs/Dockerfile-${{ matrix.os }}
+          # These platforms fail: linux/arm/v7, linux/ppc64le
+          platforms: linux/arm/v7, linux/ppc64le
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}