init

server/Dockerfile

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+# 1. Builder Stage
+FROM rust:1.92 AS builder
+
+WORKDIR /app
+
+# --- OPTIMIZATION: Dependency Caching ---
+# 1. Create a dummy project to cache dependencies
+RUN mkdir src
+RUN echo "fn main() {}" > src/main.rs
+
+# 2. Copy manifests
+COPY Cargo.toml Cargo.lock ./
+
+# 3. Build only dependencies (this layer is cached until Cargo.toml changes)
+RUN cargo build --release
+
+# 4. Now remove dummy source and copy your actual source
+#    We 'touch' main.rs to ensure Cargo realizes it needs a rebuild
+RUN rm -rf src
+COPY . .
+RUN touch src/main.rs
+
+# 5. Build the actual application
+RUN cargo build --release
+
+# 2. Runtime Stage
+FROM debian:bookworm-slim
+
+WORKDIR /app
+
+# Install OpenSSL & CA Certificates
+RUN apt-get update && \
+    apt-get install -y libssl3 ca-certificates && \
+    rm -rf /var/lib/apt/lists/*
+
+# Copy the binary from builder
+# Note: Ensure the binary name matches 'package.name' in Cargo.toml ("server")
+COPY --from=builder /app/target/release/server .
+
+# Documentation for ports
+EXPOSE 3000
+
+# Run the binary
+CMD ["./server"]