pi-studio binds the container's 127.0.0.1, which a published Docker port
can't reach. Add a robust, portable bridge rather than a doc-only one-liner:
- Dockerfile.base: add socat (~1 MB, generally useful TCP relay).
- rootfs/usr/local/bin/studio-expose: socat TCP relay listening on the
container's egress IPv4 (not 0.0.0.0 — that would EADDRINUSE against
Studio's loopback listener) forwarding to 127.0.0.1:PORT on the SAME
port, so Studio's printed token URL works verbatim. Robust egress-IP
detection (hostname -I, loopback-filtered; ip route get fallback),
--help, port validation, foreground.
- entrypoint-user.sh: opt-in STUDIO_EXPOSE=1 auto-starts the bridge in the
background (studio variant only). Default OFF — Studio stays loopback-only
(its secure default) unless explicitly opted in.
- README: 'Using pi-studio' now documents host-networking (A) and the
studio-expose/STUDIO_EXPOSE bridge (B) with a security note; ssh -L for
remote, mosh caveat retained.
- smoke-test: assert socat + studio-expose present (base-level).
- CHANGELOG/AGENTS updated.
No tag — stopping for review.
pi