add dockerfiles

Dockerfile

@@ -0,0 +1,21 @@
+FROM rust:bookworm as rust
+
+FROM rust as chef
+RUN  apt update && apt install -y build-essential && cargo install --locked cargo-chef
+WORKDIR /app
+
+FROM chef as planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+RUN apt install -y libprotobuf-dev protobuf-compiler
+COPY --from=planner /app/recipe.json recipe.json
+RUN cargo chef cook --release --recipe-path recipe.json
+COPY . .
+RUN cargo build --release --package chat-signaling-server --bin server
+
+FROM debian:bookworm AS runtime
+WORKDIR /app
+COPY --from=builder /app/target/release/server /usr/local/bin
+ENTRYPOINT ["/usr/local/bin/server"]