Dockerfile.gateway

# Dockerfile.gateway — Standalone gateway binary (backward-compatible)
#
# Builds the openab-gateway binary that bridges webhook platforms to OAB via WebSocket.
# This is the same functionality as the old standalone gateway/ directory.
#
# Usage:
#   docker build -f Dockerfile.gateway -t openab-gateway .
#   docker build -f Dockerfile.gateway --build-arg FEATURES=telegram,line -t openab-gateway:slim .

ARG FEATURES=""

FROM rust:1-bookworm AS builder
ARG FEATURES

WORKDIR /build
COPY Cargo.toml Cargo.lock ./
COPY crates/openab-core/Cargo.toml crates/openab-core/Cargo.toml
COPY crates/openab-gateway/Cargo.toml crates/openab-gateway/Cargo.toml
RUN mkdir -p src crates/openab-core/src crates/openab-gateway/src \
    && echo 'fn main() {}' > src/main.rs \
    && echo 'fn main() {}' > crates/openab-gateway/src/main.rs \
    && echo '' > crates/openab-core/src/lib.rs \
    && echo '' > crates/openab-gateway/src/lib.rs \
    && cargo build --release -p openab-gateway \
    && rm -rf src crates/openab-core/src crates/openab-gateway/src
COPY crates/ crates/
COPY src/ src/
RUN touch crates/openab-gateway/src/main.rs crates/openab-gateway/src/lib.rs && \
    if [ -n "$FEATURES" ]; then \
      cargo build --release -p openab-gateway --no-default-features --features "$FEATURES"; \
    else \
      cargo build --release -p openab-gateway; \
    fi

# --- Runtime stage ---
FROM debian:trixie-slim
RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates tini && rm -rf /var/lib/apt/lists/*

RUN useradd -m -s /bin/bash -u 1000 gateway
WORKDIR /home/gateway

COPY --from=builder --chown=gateway:gateway /build/target/release/openab-gateway /usr/local/bin/openab-gateway

USER gateway
EXPOSE 8080
HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
  CMD curl -sf http://localhost:8080/health || exit 1

ENTRYPOINT ["tini", "--"]
CMD ["openab-gateway"]