golang-app/Dockerfile

FROM golang:alpine as builder

LABEL org.opencontainers.image.authors="psssix <psssix@gmail.com>"

# set build environmet variables needed for multistage building
ENV CGO_ENABLED=0 \
    GOOS=linux

# source workdir
WORKDIR /source

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

# Copy the code into the container
COPY . .

# Build the application
RUN go build -ldflags "-s -w" -o bin/app .

FROM scratch

# or alpine, if you need install utilities
#
#FROM alpine:latest
#
## Add entrypoint dependency
#RUN apk add --no-cache bash
#RUN apk add --no-cache mysql-client mariadb-connector-c

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

# Copy binary from build to main folder
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /source/bin/app app

# Copy some application assets
#COPY --from=builder /source/deploy/docker/environment.sh ./deploy/docker/environment.sh
#COPY --from=builder /source/deploy/docker/logging.sh ./deploy/docker/logging.sh
#COPY --from=builder /source/entrypoint.sh .
#COPY --from=builder /source/migrations ./migrations
#COPY ./database/data.json /database/data.json

# Export necessary port
#EXPOSE 3000

# entry and start entrypoint with some actions and checks before CMD
#ENTRYPOINT ["bash", "/entrypoint.sh" ]

# Command to run when starting the container
CMD ["/app"]

# if have not application daemon
#CMD tail -f /dev/null