Initial release

This is a matrix bot which announces the lol hackerspace's
open / closed state to a list of matrix rooms, it is based
on rumqtt and matrix-rust-sdk. The bot connects to the
configured matrix homeserver and an MQTT broker broadcasting
changes in the door sensor state

Dockerfile

@@ -0,0 +1,25 @@
+FROM rust:1.98.1-slim-trixie AS build
+
+RUN USER=root cargo new --bin matrix-feedbot
+WORKDIR /matrix-lolopener
+
+COPY Cargo.lock ./
+COPY Cargo.toml ./
+
+RUN apt-get update && apt-get install -y --no-install-recommends libssl-dev pkg-config
+
+# cache dependencies
+RUN cargo build --release
+RUN rm src/*.rs
+
+COPY src ./src
+
+RUN rm target/release/deps/matrix_lolopener*
+RUN cargo build --release
+
+FROM debian:trixie-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends libssl3 ca-certificates && apt-get clean
+COPY --from=build /matrix-lolopener/target/release/matrix-lolopener .
+
+CMD ["./matrix-lolopener"]