fix: improve Docker configuration and documentation

- Change Python path defaults to Docker paths (/data/state, /out)
- Remove STATE_DIR/OUT_DIR from Dockerfile ENV (Python defaults now correct)
- Remove REPEATER_FETCH_ACL feature (unsupported)
- Fix nginx tmpfs permissions with uid=101,gid=101
- Remove Ofelia [global] save=true (caused config parse error)
- Switch to bind mounts for ./out instead of named volume
- Comment out devices section (not available on macOS Docker)
- Add TCP and BLE transport options to meshcore.conf.example
- Document correct macOS socat command for serial-over-TCP
- Update README with macOS Docker workaround instructions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

@@ -90,14 +90,11 @@ COPY --chown=meshmon:meshmon docker/ofelia.ini /app/ofelia.ini
 # - PYTHONUNBUFFERED: Ensure logs are output immediately
 # - PYTHONDONTWRITEBYTECODE: Don't create .pyc files
 # - MPLCONFIGDIR: Matplotlib font cache directory
-# - STATE_DIR/OUT_DIR: Default paths for Docker volumes
 ENV PATH="/opt/venv/bin:$PATH" \
     PYTHONPATH=/app/src \
     PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
-    MPLCONFIGDIR=/tmp/matplotlib \
-    STATE_DIR=/data/state \
-    OUT_DIR=/out
+    MPLCONFIGDIR=/tmp/matplotlib
 
 WORKDIR /app