Give the sbx CLI its cache and state paths in the drukbox containers - #750
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The gateway tunnel runs `sbx ssh proxy`. It reads the feature flags from the sbx cache and dials the daemon socket through XDG_STATE_HOME, so without them the tunnel sees the SSH endpoint as off. The overlay now mounts the sbx cache and the directory of the daemon socket, and sets XDG_CACHE_HOME and XDG_STATE_HOME. A directory mount keeps the new socket after a daemon restart. install.sh creates the cache directory with the deploy user's owner.
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The drukbox gateway tunnel runs
sbx ssh proxyin the gateway container. The container has no home directory for the deploy uid. Then sbx finds no feature flags, sees the daemon's SSH endpoint as off, and the tunnel fails with "the sandboxd SSH endpoint is disabled".Changes in the
x-sbx-rigandx-sbx-envanchors ofdeploy/compose.docker-sbx.yaml, so every drukbox service gets them:.cache/sandboxes, where sbx keeps its feature flags.XDG_CACHE_HOMEandXDG_STATE_HOMEpoint the CLI to the mounts.sbx ssh proxyfinds the socket throughXDG_STATE_HOMEonly.DOCKER_SANDBOXES_APInow names the socket inside the mounted directory, for the other commands.install.shcreates.cache/sandboxeswith the deploy user's owner, as it does for.config/sandboxes. Docker would create a missing bind source as root.The mounts match the container recipe in czpython/drukbox#62. Refs czpython/drukbox#61.