ARG ARCH

# STEP 1 build executable binary
FROM amd64/golang:1.16.3-alpine3.13@sha256:6600d9933c681cb38c13c2218b474050e6a9a288ac62bdb23aee13bc6dedce18 AS builder-amd64
FROM arm32v7/golang:1.16.3-alpine3.13@sha256:ef19eaeed2a7385423753a14c4e860a716182d1e82d9b69142f415f86640c841 AS builder-arm
FROM arm64v8/golang:1.16.3-alpine3.13@sha256:7d669e2896680ccedd124561f18a12cc9530d1864187a26f3bedcf161fe819b0 AS builder-arm64
FROM builder-${ARCH} AS builder

ENV MORTY_VERSION="f5bff1e285d3f973cacf73318e55175edafd633f"

WORKDIR $GOPATH/src/github.com/asciimoo/morty

RUN apk upgrade --no-cache && \
    apk add --no-cache git="2.30.2-r0" && \
    git clone https://github.com/asciimoo/morty.git . && \
    git checkout "${MORTY_VERSION}"

RUN go get -d -v && gofmt -l ./ && go build .

# STEP 2 build the image including only the binary
FROM amd64/alpine:3.13.5@sha256:def822f9851ca422481ec6fee59a9966f12b351c62ccb9aca841526ffaa9f748 AS base-amd64
FROM arm32v7/alpine:3.13.5@sha256:9663906b1c3bf891618ebcac857961531357525b25493ef717bca0f86f581ad6 AS base-arm
FROM arm64v8/alpine:3.13.5@sha256:8f18fae117ec6e5777cc62ba78cbb3be10a8a38639ccfb949521abd95c8301a4 AS base-arm64
FROM base-${ARCH}

RUN apk upgrade --no-cache && \
    apk --no-cache add ca-certificates="20191127-r5" && \
    rm -f /var/cache/apk/* && \
    adduser -D -h /usr/local/morty -s /bin/false morty morty

COPY --from=builder /go/src/github.com/asciimoo/morty/morty /usr/local/morty/morty

EXPOSE 3000
USER morty

ENTRYPOINT ["/usr/local/morty/morty"]