Dockerfile.alpine

# Build with: DOCKER_BUILDKIT=1 docker build -t opensentry/idpui:`cat ./VERSION` -f Dockerfile.alpine .

ARG GO_VERSION=1.12
ARG ALPINE_VERSION=3.10.3

FROM golang:${GO_VERSION}-alpine AS builder

ARG APP=idpui

RUN apk add --update --no-cache ca-certificates cmake make g++ openssl-dev git curl pkgconfig libcap

WORKDIR $GOPATH/src/github.com/opensentry/${APP}

COPY . .

RUN rm -f go.mod go.sum
RUN rm -f application-build*

RUN go get -d -v ./...

RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -o /app
RUN cp -r ./views /views # /views is static data, which isnt built within the binary
RUN cp -r ./public /public # /public is static data, which isnt built within the binary

RUN setcap 'cap_net_bind_service=+ep' /app

# Create alpine runtime image
FROM alpine:${ALPINE_VERSION}

COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /app /app
COPY --from=builder /views /views
COPY --from=builder /public /public

USER 1000

EXPOSE 443

ENTRYPOINT ["/app"]
CMD ["--help"]