build: configure act_runner and simplify Docker workflow to amd64

- act_runner.compose.yml: auto-register with forge, mount Docker socket
- act_runner.config.yaml: pass Docker socket to job containers, host network
- docker.yml: drop QEMU/multi-arch, build linux/amd64 only (faster)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/docker.yml

@@ -12,9 +12,6 @@ jobs:
       - name: checkout
         uses: actions/checkout@v3
 
-      - name: qemu
-        uses: docker/setup-qemu-action@v2
-
       - name: buildx
         uses: docker/setup-buildx-action@v2
 
@@ -30,7 +27,7 @@ jobs:
         with:
           context: .
           file: ./docker/Dockerfile
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           push: true
           cache-from: type=gha
           cache-to: type=gha,mode=max

docker/act_runner.compose.yml

@@ -1,29 +1,22 @@
 version: "3"
 
-# Gitea act_runner - to be deployed on Unraid (or any Docker host).
-# Allows Gitea Actions workflows to run and build Docker images automatically.
+# Gitea act_runner for Unraid
+# Place this file at: /mnt/user/appdata/act_runner/docker-compose.yml
+# Place act_runner.config.yaml at: /mnt/user/appdata/act_runner/config.yaml
 #
-# Setup steps:
-#   1. Copy this file to /mnt/user/appdata/act_runner/docker-compose.yml
-#   2. Register the runner to get a token:
-#        docker run --rm -it gitea/act_runner:latest \
-#          register --no-interactive \
-#          --instance http://10.111.111.4:3000 \
-#          --token <REGISTRATION_TOKEN> \
-#          --name unraid-runner \
-#          --labels ubuntu-latest:docker://node:16-bullseye
-#      (get the registration token from forge.dilain.com → Settings → Actions → Runners)
-#   3. Copy the generated .runner file into /mnt/user/appdata/act_runner/
-#   4. Start: docker compose up -d
+# Start: docker compose up -d
 
 services:
   act_runner:
     image: gitea/act_runner:latest
-    container_name: act_runner
+    container_name: gitea-act-runner
     restart: unless-stopped
     environment:
-      - DOCKER_HOST=unix:///var/run/docker.sock
+      CONFIG_FILE: /data/config.yaml
+      GITEA_INSTANCE_URL: https://forge.dilain.com
+      GITEA_RUNNER_REGISTRATION_TOKEN: ex81a1Lror8JhaByGQ2CqppXvvO8nS7cuwqEQ7P5
+      GITEA_RUNNER_NAME: unraid-runner
+      GITEA_RUNNER_LABELS: ubuntu-latest:docker://node:20-bullseye
     volumes:
       - /mnt/user/appdata/act_runner:/data
       - /var/run/docker.sock:/var/run/docker.sock
-    working_dir: /data

docker/act_runner.config.yaml

@@ -0,0 +1,16 @@
+runner:
+  capacity: 1
+  timeout: 3h
+  insecure: false
+
+cache:
+  enabled: true
+
+container:
+  # Pass the host Docker socket into every job container so
+  # docker/build-push-action can build and push images.
+  options: -v /var/run/docker.sock:/var/run/docker.sock
+  # Use the host network so the job container can reach forge.dilain.com
+  network: host
+  valid_volumes:
+    - /var/run/docker.sock