Add docker build

Dockerfile

@@ -0,0 +1,16 @@
+FROM rust:slim as builder
+
+RUN apt-get update && apt-get install -y libssl-dev pkg-config
+# build deps only first for build cache
+WORKDIR /usr/src
+RUN USER=root cargo new chimemon
+COPY Cargo.toml Cargo.lock /usr/src/chimemon/
+WORKDIR /usr/src/chimemon
+RUN cargo build --release
+COPY . .
+RUN cargo build --release
+
+FROM debian:bullseye-slim
+WORKDIR /app
+COPY --from=builder /usr/src/chimemon/target/release/chimemon chimemon
+CMD ["/app/chimemon"]