Add a log view, and Docker packaging

The Log button shows the running daemon live: feed scans, downloads,
torrents and every HTTP request. It reads a ring buffer filled by a
tracing layer rather than tailing a file, so it works under Docker where
logs go to stdout. The access-log middleware skips /api/logs, or the
panel's poll would log itself forever.

Detached torrents could leave a row stuck in 'downloading' across a
restart, where nothing would ever revisit it; those are requeued at
startup.

Dockerfile, entrypoint and compose: 114 MB runtime, config bound to
0.0.0.0 on first run since container loopback is unreachable, drops to
PUID:PGID for Unraid, and a healthcheck that goes through the control
socket so a wedged worker reads as unhealthy.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AdXho5tTkjFLeUXKbEjKBh

Dockerfile

@@ -0,0 +1,39 @@
+# Build. rusqlite is bundled (compiles SQLite from source) and librqbit needs a C
+# toolchain, so the builder needs cc. TLS is rustls throughout, so no OpenSSL headers.
+FROM rust:1-slim-bookworm AS build
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        build-essential \
+    && rm -rf /var/lib/apt/lists/*
+WORKDIR /src
+
+# Dependencies first, so editing the source does not rebuild librqbit every time.
+COPY Cargo.toml Cargo.lock ./
+RUN mkdir src && echo 'fn main(){}' > src/main.rs \
+    && cargo build --release --locked \
+    && rm -rf src
+
+COPY src ./src
+COPY web ./web
+# cargo skips a rebuild if mtimes look untouched; make sure it does not.
+RUN touch src/main.rs && cargo build --release --locked
+
+FROM debian:bookworm-slim
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        ca-certificates gosu \
+    && rm -rf /var/lib/apt/lists/*
+COPY --from=build /src/target/release/ipx /usr/local/bin/ipx
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/docker-entrypoint.sh
+
+ENV IPX_CONFIG=/config/config.toml \
+    IPX_DATA_DIR=/data \
+    IPX_LOG=ipx=info \
+    PUID=99 \
+    PGID=100
+VOLUME ["/config", "/data", "/downloads"]
+
+# Web UI, and the BitTorrent peer port (TCP and UDP -- DHT needs the UDP side).
+EXPOSE 8099/tcp 6881/tcp 6881/udp
+
+ENTRYPOINT ["docker-entrypoint.sh"]
+CMD ["ipx", "daemon"]