add armv6 again

.github/workflows/armv6.yaml

@@ -0,0 +1,29 @@
+name: Docker armv6
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Login to DockerHub
+      uses: docker/login-action@v2
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Set up Docker Buildx
+      id: buildx
+      uses: crazy-max/ghaction-docker-buildx@v3
+      with:
+        buildx-version: latest
+        qemu-version: latest
+    - name: Available platforms
+      run: echo ${{ steps.buildx.outputs.platforms }}
+    - name: Run Buildx
+      run: docker buildx build --platform linux/arm/v6 -t kerberos/base:armv6-$(echo $GITHUB_SHA | cut -c1-7) --push . 
+    - name: Append manifest
+      run: docker buildx imagetools create --append -t kerberos/base:$(echo $GITHUB_SHA | cut -c1-7) kerberos/base:armv6-$(echo $GITHUB_SHA | cut -c1-7)