Dockerize Go App

Dockerfile

FROM golang:1.13.6-stretch AS builder

RUN apt-get update && apt-get install git ca-certificates && update-ca-certificates

ENV GO111MODULE=on\
    CGO_ENABLED=0

WORKDIR /build

# Cache go modules – they don't change much often
COPY go.mod .
COPY go.sum .
RUN go mod download

# Copy the code files needed for the compilation stage
COPY . .

# Compile an app
RUN go build ./cmd/avatar_sync

# Create the /dist folder holding application files
WORKDIR /dist
RUN cp /build/avatar_sync ./avatar_sync

## Minimal runtime image
FROM scratch

COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

COPY --chown=0:0 --from=builder /dist /

ENTRYPOINT ["./avatar_sync"]