add Dockerfile

Dockerfile

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+FROM rust:1.76-slim-bookworm as build
+
+# create a new empty shell project
+RUN USER=root cargo new --bin hitster
+WORKDIR /hitster
+
+# copy over your manifests
+COPY ./server/Cargo.toml ./Cargo.toml
+
+# this build step will cache your dependencies
+RUN cargo build --release
+RUN rm src/*.rs
+
+# copy your source tree
+COPY ./server/migrations ./migrations
+COPY ./server/src ./src
+COPY ./server/build.rs ./build.rs
+COPY ./server/etc ./etc
+
+# build for release
+RUN rm ./target/release/deps/hitster*
+RUN cargo build --release
+
+# our final base
+FROM debian:bookworm-slim
+
+# copy the build artifact from the build stage
+COPY --from=build /hitster/target/release/hitster-server ./hitster
+
+# set the startup command to run your binary
+CMD ["./hitster"]