feat: add forgejo-runner docker files

docker/forgejo-runner/docker-compose.yml

@@ -0,0 +1,32 @@
+---
+networks:
+  forgejo:
+    external: false
+
+services:
+  docker-in-docker:
+    image: docker:dind
+    container_name: 'docker_dind'
+    privileged: 'true'
+    command: ['dockerd', '-H', 'tcp://0.0.0.0:2375', '--tls=false']
+    restart: 'unless-stopped'
+
+  runner:
+    image: code.forgejo.org/forgejo/runner:3.5.0
+    links:
+      - docker-in-docker
+    depends_on:
+      docker-in-docker:
+        condition: service_started
+    container_name: 'runner'
+    user: 1001:1001
+    restart: unless-stopped
+    command: '/bin/sh -c "sleep 5; forgejo-runner daemon"'
+    environment:
+      DOCKER_HOST: tcp://docker-in-docker:2375
+    networks:
+      - forgejo
+    volumes:
+      - ${FORGEJO_RUNNER_DATA:-/mnt/nas1/shared/forgejo-runner/data}:/data
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro