Add Dockerfile

Multi-stage build with dependency caching for faster rebuilds.
Includes both ldk-server and ldk-server-cli binaries.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: benthecarman

.dockerignore

@@ -0,0 +1,6 @@
+target/
+.git/
+.github/
+.claude/
+e2e-tests/
+*.md

Dockerfile

@@ -0,0 +1,42 @@
+FROM rust:1.85 AS builder
+
+WORKDIR /app
+
+# Copy manifests and lock file first for dependency caching
+COPY Cargo.toml Cargo.lock ./
+COPY ldk-server/Cargo.toml ldk-server/Cargo.toml
+COPY ldk-server-cli/Cargo.toml ldk-server-cli/Cargo.toml
+COPY ldk-server-client/Cargo.toml ldk-server-client/Cargo.toml
+COPY ldk-server-protos/Cargo.toml ldk-server-protos/Cargo.toml
+COPY ldk-server-protos/build.rs ldk-server-protos/build.rs
+
+# Create dummy source files so cargo can resolve and build dependencies
+RUN mkdir -p ldk-server/src ldk-server-cli/src ldk-server-client/src ldk-server-protos/src \
+    && echo "fn main() {}" > ldk-server/src/main.rs \
+    && echo "fn main() {}" > ldk-server-cli/src/main.rs \
+    && echo "" > ldk-server-client/src/lib.rs \
+    && echo "" > ldk-server-protos/src/lib.rs
+
+# Build dependencies only (this layer is cached unless Cargo.toml/Cargo.lock change)
+RUN cargo build --release -p ldk-server --all-features \
+    && cargo build --release -p ldk-server-cli
+
+# Copy real source and rebuild
+COPY . .
+RUN touch ldk-server/src/main.rs ldk-server-cli/src/main.rs \
+    ldk-server-client/src/lib.rs ldk-server-protos/src/lib.rs \
+    && cargo build --release -p ldk-server --all-features \
+    && cargo build --release -p ldk-server-cli
+
+FROM debian:bookworm-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/target/release/ldk-server /usr/local/bin/ldk-server
+COPY --from=builder /app/target/release/ldk-server-cli /usr/local/bin/ldk-server-cli
+
+EXPOSE 9735 3002
+
+ENTRYPOINT ["ldk-server"]