FROM golang:1.20-alpine
WORKDIR /usr/src/app

# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
COPY go.mod index-inlined-minified.html main.go ./
RUN go mod download && go mod verify

RUN go build -v -o /usr/local/bin/app ./...

ENV PORT=8000
ENV BIND=0.0.0.0

CMD ["app"]