Dockerfile

FROM rust:1.81-bookworm AS builder
WORKDIR /app
COPY Cargo.toml Cargo.lock* ./
RUN mkdir -p src && echo 'fn main() { println!("stub"); }' > src/main.rs
RUN cargo build --release || true
COPY . .
RUN cargo build --release

FROM debian:bookworm-slim
RUN useradd -r -s /usr/sbin/nologin mailcard
WORKDIR /app
COPY --from=builder /app/target/release/mail-card /usr/local/bin/mail-card
COPY config.example.toml /app/config.example.toml
RUN mkdir -p /app/data && chown -R mailcard:mailcard /app
USER mailcard
EXPOSE 2525 8110 8143 4045
CMD ["mail-card", "serve", "--config", "/app/config.toml"]