ARG ARCH

# STEP 1 build executable binary
FROM amd64/golang:1.16.3-alpine3.13@sha256:734250bcdf5b6578e9596bf1e52824306469c7f55923b2e13a29e7c03ccd411e AS builder-amd64
FROM arm32v7/golang:1.16.3-alpine3.13@sha256:c9fe18379aa3cea020dd22ce32a861232e087e1954a54a625cf95c0e5eafd74c AS builder-arm
FROM arm64v8/golang:1.16.3-alpine3.13@sha256:3ac1ec8dc5ae7f05d2ac7197ed8870188fc80836d5fda118f9626dfdb76c0124 AS builder-arm64
FROM builder-${ARCH} AS builder

ENV MORTY_VERSION="5489cf4f5876106b53293d4023d49de880421b27"

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:3.13.4@sha256:e103c1b4bf019dc290bcc7aca538dc2bf7a9d0fc836e186f5fa34945c5168310 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"]