Dockerfile

FROM rust:1.73-bookworm as builder

WORKDIR /usr/src/app
COPY . .
# Will build and cache the binary and dependent crates in release mode
RUN --mount=type=cache,target=/usr/local/cargo,from=rust:latest,source=/usr/local/cargo \
    --mount=type=cache,target=target \
    cargo build --release && mv ./target/release/discord-telegram-simple-relay ./discord-telegram-simple-relay

# Runtime image
FROM debian:bookworm-slim

# Run as "app" user
RUN useradd -ms /bin/bash app

USER app
WORKDIR /app

# Get compiled binaries from builder's cargo install directory
COPY --from=builder /usr/src/app/discord-telegram-simple-relay /app/discord-telegram-simple-relay

# Run the app
CMD ./discord-telegram-simple-relay