fix: adding input for armv7 runner defaulting to self hosted

Author: lukashankeln

.github/workflows/build-multiarch.yml

@@ -76,6 +76,11 @@ on:
         required: false
         default: 'arc-runner-set-arm64'
         type: string
+      runner_armv7:
+        description: 'Runner label for armv7 builds'
+        required: false
+        default: 'self-hosted'
+        type: string
     outputs:
       digest_amd64:
         description: 'Image digest for amd64'
@@ -188,9 +193,8 @@ jobs:
           secret-envs: ${{ inputs.build_secret_envs }}
 
   build-armv7:
-    # Cross-compile on amd64 — much faster than QEMU emulation on a native armv7 runner
     if: contains(inputs.architectures, 'armv7')
-    runs-on: ${{ inputs.runner_amd64 }}
+    runs-on: ${{ inputs.runner_armv7 }}
     permissions:
       contents: read
       packages: write
@@ -208,7 +212,7 @@ jobs:
           echo "build_timestamp=$(date -u +"%Y-%m-%dT%H:%M:%SZ")" >> $GITHUB_OUTPUT
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a # v4
+        uses: docker/setup-qemu-action@06116385d9baf250c9f4dcb4858b16962ea869c3 # v4.1.0
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0

README.md

@@ -86,6 +86,7 @@ Builds a Docker image natively on amd64 and arm64 runners, cross-compiles armv7
 | `push_latest` | no | `true` | Push a `:latest` tag alongside the version tag |
 | `runner_amd64` | no | `arc-runner-set-amd64` | Runner label for amd64 native builds |
 | `runner_arm64` | no | `arc-runner-set-arm64` | Runner label for arm64 native builds |
+| `runner_armv7` | no | `self-hosted` | Runner label for armv7 builds |
 
 #### Outputs