Add Dockerfile

Dockerfile

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+FROM lukemathwalker/cargo-chef as planner
+WORKDIR app
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM lukemathwalker/cargo-chef as cacher
+WORKDIR app
+COPY --from=planner /app/recipe.json recipe.json
+RUN cargo chef cook --release --recipe-path recipe.json
+
+FROM rust as builder
+WORKDIR app
+COPY . .
+# Copy over the cached dependencies
+COPY --from=cacher /app/target target
+COPY --from=cacher $CARGO_HOME $CARGO_HOME
+RUN cargo build --release --bin bind9-api
+
+FROM rust as runtime
+WORKDIR app
+COPY --from=builder /app/target/release/bind9-api /usr/local/bin
+ENTRYPOINT ["/usr/local/bin/bind9-api"]