update drone.yml - test docker socket access

drone.yml

@@ -3,6 +3,16 @@ type: docker
 name: build-and-push-multiarch
 
 steps:
+
+  - name: check-docker
+    image: docker:26
+    privileged: true
+    volumes:
+      - name: docker_sock
+        path: /var/run/docker.sock
+    commands:
+      - docker info
+
   - name: build-amd64
     image: docker:26
     privileged: true
@@ -47,3 +57,8 @@ steps:
           --amend ${REGISTRY_URL}/portainer-agent-tailscale:amd64 \
           --amend ${REGISTRY_URL}/portainer-agent-tailscale:arm64
       - docker manifest push ${REGISTRY_URL}/portainer-agent-tailscale:latest
+
+volumes:
+  - name: docker_sock
+    host:
+      path: /var/run/docker.sock