FROM rust:alpine AS builder

# Switch to the nightly build
RUN rustup default nightly

WORKDIR /usr/src/app

# Install build dependencies & create a new dummy project
# that we use as a build cache
RUN apk update && \
    apk add --no-cache openssl openssl-dev musl-dev && \
    cargo init --bin

# Build the dependencies
# This is done separately to reduce average compile time
# Afterwards, we remove the dummy src directory
COPY Cargo.toml Cargo.lock ./
RUN cargo build --release && \
    rm src/*.rs

# Now, we build our own source code
COPY src/ ./src
RUN cargo install --path .


# Now, we create the actual image
FROM alpine:latest

# Install dependencies
RUN apk update && apk add --no-cache openssl

COPY --from=builder /usr/local/cargo/bin/rust-api /usr/local/bin/rust-api

CMD ["rust-api"]