dockerfile multistage demo+server

Dockerfile

@@ -0,0 +1,34 @@
+# Build the demo application
+FROM rust:latest AS builder-demo
+
+WORKDIR /build/demo
+
+COPY ./demo ./
+RUN --mount=type=cache,target=/usr/local/cargo/registry \
+    --mount=type=cache,target=/build/demo/target \
+    cargo build --release
+
+# Build the server application
+FROM rust:alpine AS builder-server
+
+RUN apk update && apk add musl-dev
+WORKDIR /build/server
+
+COPY ./src ./src
+COPY ./Cargo.toml ./Cargo.lock ./
+# --mount=type=cache,id=s/<service id>-<target path>,target=<target path>
+RUN --mount=type=cache,id=s/dynamic-preauth,target=/app/target/ \
+    --mount=type=cache,id=s/dynamic-preauth,target=/usr/local/cargo/git/db \
+    --mount=type=cache,id=s/dynamic-preauth,target=/usr/local/cargo/registry/ \
+    cargo build --release
+
+# Run the server application
+FROM alpine:latest
+
+WORKDIR /app
+
+EXPOSE $PORT
+COPY --from=builder-demo /build/demo/target/release/demo ./demo
+COPY --from=builder-server /build/server/target/release/dynamic-preauth ./dynamic-preauth
+
+CMD ["/app/dynamic-preauth"]