added dockerfile

Dockerfile

@@ -0,0 +1,35 @@
+# official Rust image as a builder
+FROM rust:1.70 as builder
+
+# new empty project
+RUN USER=root cargo new --bin app
+WORKDIR /app
+
+# copy my manifests
+COPY ./Cargo.lock ./Cargo.lock
+COPY ./Cargo.toml ./Cargo.toml
+
+# build only the dependencies to cache them
+RUN cargo build --release
+RUN rm src/*.rs
+
+# copy the source code
+COPY ./src ./src
+
+# remove the dummy target
+RUN rm ./target/release/deps/fahrenheit_celsius_kelvin_converter*
+
+# set the build to be statically linked
+RUN RUSTFLAGS='-C target-feature=+crt-static'
+
+# build for release
+RUN cargo build --release
+
+# final base image, use the same Debian version as the builder
+FROM debian:bullseye-slim
+
+# copy the build artifact from the build stage
+COPY --from=builder /app/target/release/fahrenheit_celsius_kelvin_converter .
+
+# set the startup command to run binary
+CMD ["./fahrenheit_celsius_kelvin_converter"]