ARG ARCH

# STEP 1 build executable binary
FROM amd64/golang:1.16.2-alpine3.13@sha256:4891e17c9d2de88ebd1d9421919539226a76773d6ad1b4ac7376b286039c9be2 AS builder-amd64
FROM arm32v7/golang:1.16.2-alpine3.13@sha256:b885ff63622e475e28322ed1e75c220c51b27f7aee8dd5aa8b8150dc408e0f87 AS builder-arm
FROM arm64v8/golang:1.16.2-alpine3.13@sha256:8cab145c26bb1d6e0369c53c0c8def3781c218ab7099a879262fd9b5e4ed9197 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:3.13.4@sha256:59b46c319f3b66dfda96faafd0c6959e9b2f409792d0236204f270dfd0235960 AS base-arm
FROM arm64v8/alpine:3.13.4@sha256:071fa5de01a240dbef5be09d69f8fef2f89d68445d9175393773ee389b6f5935 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"]