init

Dockerfile

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+# Make sure RUST_VERSION matches the Rust version
+ARG RUST_VERSION=1.92
+ARG APP_NAME=docker-rust-hello
+
+################################################################################
+# Create a stage for building the application.
+################################################################################
+
+FROM dhi.io/rust:${RUST_VERSION}-alpine3.22-dev AS build
+ARG APP_NAME
+WORKDIR /app
+
+# Install host build dependencies.
+RUN apk add --no-cache clang lld musl-dev git
+
+# Build the application.
+RUN --mount=type=bind,source=src,target=src \
+    --mount=type=bind,source=Cargo.toml,target=Cargo.toml \
+    --mount=type=bind,source=Cargo.lock,target=Cargo.lock \
+    --mount=type=cache,target=/app/target/ \
+    --mount=type=cache,target=/usr/local/cargo/git/db \
+    --mount=type=cache,target=/usr/local/cargo/registry/ \
+    cargo build --locked --release && \
+    cp ./target/release/$APP_NAME /bin/server
+
+################################################################################
+# Create a new stage for running the application that contains the minimal
+# We use dhi.io/static for the final stage because it’s a minimal Docker Hardened Image runtime (basically “just # enough OS to run the binary”), which helps keep the image small and with a lower attack surface compared to a # # full Alpine/Debian runtime.
+################################################################################
+
+FROM dhi.io/static:20250419 AS final
+
+# Create a non-privileged user that the app will run under.
+ARG UID=10001
+RUN adduser \
+    --disabled-password \
+    --gecos "" \
+    --home "/nonexistent" \
+    --shell "/sbin/nologin" \
+    --no-create-home \
+    --uid "${UID}" \
+    appuser
+USER appuser
+
+# Copy the executable from the "build" stage.
+COPY --from=build /bin/server /bin/
+
+# Configure rocket to listen on all interfaces.
+ENV ROCKET_ADDRESS=0.0.0.0
+
+# Expose the port that the application listens on.
+EXPOSE 8000
+
+# What the container should run when it is started.
+CMD ["/bin/server"]