Mount ARM64 shared libraries required by docker binary

compose-snippets/act_runner.yml

@@ -3,8 +3,8 @@
 # Registers at instance level — services all repos.
 #
 # host mode: jobs run inside the act_runner container.
-# docker and node binaries are mounted from arrsstack's host filesystem
-# so workflow steps can call docker build, docker push, etc.
+# docker and node binaries + their ARM64 shared libraries are mounted from
+# arrsstack's host filesystem so workflow steps can call docker build/push etc.
 #
 # Setup:
 #   1. Gitea → Site Administration → Actions → Runners → Create Runner → copy token
@@ -25,6 +25,9 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock
       - /usr/bin/docker:/usr/bin/docker:ro
       - /usr/bin/node:/usr/bin/node:ro
+      # ARM64 shared libraries required by docker binary
+      - /lib/aarch64-linux-gnu/libc.so.6:/lib/aarch64-linux-gnu/libc.so.6:ro
+      - /lib/ld-linux-aarch64.so.1:/lib/ld-linux-aarch64.so.1:ro
       - act_runner_data:/data
 
 volumes: