diff --git a/worker/Dockerfile b/worker/Dockerfile
new file mode 100644
index 0000000..a741aa3
--- /dev/null
+++ b/worker/Dockerfile
@@ -0,0 +1,14 @@
+FROM rust:1.87-bookworm AS build
+WORKDIR /app
+COPY Cargo.toml Cargo.lock* ./
+# Dummy main for dependency caching
+RUN mkdir src && echo "fn main() {}" > src/main.rs
+RUN cargo build --release 2>/dev/null || true
+# Real source
+COPY src ./src
+RUN touch src/main.rs && cargo build --release
+
+FROM debian:bookworm-slim
+RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+COPY --from=build /app/target/release/sidelinja-worker /usr/local/bin/
+ENTRYPOINT ["sidelinja-worker"]