Dockerfile.ubuntu

# supported versions here: https://hub.docker.com/_/rust
ARG RUST_BUILDER_VERSION=slim-bookworm
ARG UBUNTU_RELEASE_VERSION=noble

########################
## builder image
########################
FROM rust:${RUST_BUILDER_VERSION} AS builder

WORKDIR /redlib

# download (most) dependencies in their own layer
COPY Cargo.lock Cargo.toml ./
RUN mkdir src && echo "fn main() { panic!(\"why am i running?\") }" > src/main.rs
RUN cargo build --release --locked --bin redlib
RUN rm ./src/main.rs && rmdir ./src

# copy the source and build the redlib binary
COPY . ./
RUN cargo build --release --locked --bin redlib
RUN echo "finished building redlib!"

########################
## release image
########################
FROM ubuntu:${UBUNTU_RELEASE_VERSION} AS release

# Install ca-certificates
RUN apt-get update && apt-get install -y ca-certificates

# Import redlib binary from builder
COPY --from=builder /redlib/target/release/redlib /usr/local/bin/redlib

# Add non-root user for running redlib
RUN useradd \
    --no-create-home \
    --password "!" \
    --comment "user for running redlib" \
    redlib
USER redlib

# Document that we intend to expose port 8080 to whoever runs the container
EXPOSE 8080

# Run a healthcheck every minute to make sure redlib is functional
HEALTHCHECK --interval=1m --timeout=3s CMD wget --spider --q http://localhost:8080/settings || exit 1

# Add container metadata
LABEL org.opencontainers.image.authors="sigaloid"

CMD ["redlib"]