My multi stage Dockerfile for Go Lang Applications

Dockerfile

# syntax=docker/dockerfile:1

# specify base image
FROM golang:1.19.3-alpine as build

# enable Go Modules
ENV GO111MODULE=on

# create working directory inside the image 
WORKDIR  /app 

# copy Go modules and dependencies to image
COPY ./go.mod .
COPY ./go.sum .

# download Go modules and dependencies
RUN go mod download

# copy directory files i.e all files ending with .go
COPY . . 

# compile application
RUN  CGO_ENABLED=0  go build -o main .    

FROM golang:1.19.3-alpine

WORKDIR /app 

COPY --from=build /app/main ./

# tells Docker that the container listens on specified network ports at runtime
EXPOSE 8080


CMD [ "./main" ]