✨feature: Add docker support

Dockerfile

@@ -0,0 +1,37 @@
+FROM node:20-bookworm-slim AS frontend-builder
+WORKDIR /src/frontend
+
+COPY frontend/package.json frontend/package-lock.json ./
+RUN npm ci
+
+COPY frontend/ ./
+RUN npm run build
+
+FROM rust:1.85-bookworm AS backend-builder
+WORKDIR /src/backend
+
+COPY backend/ ./
+RUN cargo build --release
+
+FROM debian:bookworm-slim
+WORKDIR /app
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends ca-certificates ripgrep \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=backend-builder /src/backend/target/release/ironpad /app/ironpad
+COPY --from=frontend-builder /src/frontend/dist /app/static
+
+RUN mkdir -p /app/data
+
+ENV IRONPAD_HOST=0.0.0.0
+ENV IRONPAD_PORT=3000
+ENV IRONPAD_DISABLE_TRAY=1
+ENV IRONPAD_DATA_DIR=/app/data
+ENV RUST_LOG=info
+
+EXPOSE 3000
+VOLUME ["/app/data"]
+
+CMD ["./ironpad"]