Use sockets for dind

.gitignore

@@ -1 +1,2 @@
 data/
+dind/

docker-compose.yml

@@ -3,8 +3,10 @@ services:
     image: docker:dind
     container_name: 'dind'
     privileged: 'true'
-    command: ['dockerd', '-H', 'tcp://0.0.0.0:2375', '--tls=false']
+    command: ['dockerd', '-H', 'unix:///dind/docker.sock', '-G', '$RUNNER_GID']
     restart: 'unless-stopped'
+    volumes:
+      - ./dind:/dind
 
   runner:
     image: 'data.forgejo.org/forgejo/runner:6.2.2'
@@ -15,9 +17,10 @@ services:
         condition: service_started
     container_name: 'runner'
     environment:
-      DOCKER_HOST: tcp://dind:2375
+      DOCKER_HOST: 'unix:///dind/docker.sock'
     user: $RUNNER_UID:$RUNNER_GID
     volumes:
       - ./data:/data
+      - ./dind:/dind
     restart: 'unless-stopped'
     command: '/bin/sh -c "sleep 5; forgejo-runner daemon"'