FROM golang:alpine AS builder

ENV GO111MODULE=on \
    CGO_ENABLED=0 \
    GOOS=linux \
    GOARCH=amd64

RUN apk add git

WORKDIR /build

# Copy and download dependency using go mod
COPY go.mod .
COPY go.sum .
RUN go mod download

# Copy the code into the container
COPY . .

# Build the application
RUN go build -o main .

# Move to /dist directory as the place for resulting binary folder
WORKDIR /dist

# Copy binary from build to main folder
RUN cp /build/main .

# Build a small image
FROM scratch

# copy the ca-certificate.crt from the builder stage
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /dist/main /

ENTRYPOINT ["/main"]