ARG ARCH

# STEP 1 build executable binary
FROM amd64/golang:1.16.0-alpine3.13@sha256:b1e28e654c9517047fa3b2d6993047fc8a8fe3360d6707bb201a86fca73c270f AS builder-amd64
FROM arm32v7/golang:1.16.0-alpine3.13@sha256:977d60bfdf4cfd2c18701418f01a4e4d4d0f4a7bb4f6388897c21293b999370c AS builder-arm
FROM arm64v8/golang:1.16.0-alpine3.13@sha256:a23dc7ff6fb9b0fa3017035404b0abea819801b6bf0eb08667b3a549d3d17dbd AS builder-arm64
FROM builder-${ARCH} AS builder

ENV MORTY_VERSION="f56efbfca411605bc7a2b5cc8fcad91df537a597"

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

RUN apk upgrade --no-cache && \
    apk add --no-cache git="2.30.1-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:3.13.2@sha256:4661fb57f7890b9145907a1fe2555091d333ff3d28db86c3bb906f6a2be93c87 AS base-amd64
FROM arm32v7/alpine:3.13.2@sha256:db5f021b29ec8fcf605f00d2aac06345756b0ffbdea0e7994044fe9172619a0a AS base-arm
FROM arm64v8/alpine:3.13.2@sha256:c45a1db6e04b73aad9e06b08f2de11ce8e92d894141b2e801615fa7a8f68314a 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"]