ARG ARCH

# STEP 1 build executable binary
FROM amd64/golang:1.16.6-alpine3.13@sha256:4a66111be0397d2e59cac61d51aac106fe1a090bbc7fc1aed906f29f671b1efc AS builder-amd64
FROM arm32v7/golang:1.16.6-alpine3.13@sha256:a16f783ced0fcf4dac014a5ded5bc8fa437f3a5ff14a4b8ec79c17a1ba214e6d AS builder-arm
FROM arm64v8/golang:1.16.6-alpine3.13@sha256:7331f6c4317e23cce90fbb4483c83e3a49b262770f525efabb9954187c922307 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 && \
    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:3.14.0@sha256:1775bebec23e1f3ce486989bfc9ff3c4e951690df84aa9f926497d82f2ffca9d AS base-amd64
FROM arm32v7/alpine:3.14.0@sha256:088557f18d845a348b4039a63c1266b09dfbe45619dc259f05742d902edd5f25 AS base-arm
FROM arm64v8/alpine:3.14.0@sha256:53b74ddfc6225e3c8cc84d7985d0f34666e4e8b0b6892a9b2ad1f7516bc21b54 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"]