add: Dockerfile

Dockerfile

@@ -0,0 +1,48 @@
+# Build stage
+FROM rust:1-bookworm as builder
+
+WORKDIR /usr/src/rikidown
+
+# Install build dependencies required for git2 and openssl
+RUN apt-get update && apt-get install -y \
+    cmake \
+    pkg-config \
+    libssl-dev \
+    zlib1g-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy manifests to build dependencies first for caching
+COPY Cargo.toml Cargo.lock ./
+
+# Create a dummy main.rs to build dependencies
+RUN mkdir src && echo "fn main() {}" > src/main.rs
+RUN cargo build --release
+
+# Copy the actual source code
+COPY src ./src
+
+# Touch the main file to force a rebuild of the application code
+RUN touch src/main.rs
+RUN cargo build --release
+
+# Runtime stage
+FROM debian:bookworm-slim
+
+WORKDIR /app
+
+# Install runtime dependencies
+# ca-certificates is required for git cloning over HTTPS
+# libssl is required for the linked openssl dependency
+RUN apt-get update && apt-get install -y \
+    ca-certificates \
+    libssl3 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy the compiled binary from the builder stage
+COPY --from=builder /usr/src/rikidown/target/release/rikidown /usr/local/bin/rikidown
+
+# Expose the default listening port
+EXPOSE 8080
+
+# Set the entrypoint
+ENTRYPOINT ["rikidown"]