Dockerfile

FROM golang:1.18-alpine

# Install git
RUN apk --update add git ca-certificates

# setup go compiler
RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64;

# Github credentials that will be passed as arguments
ARG GIT_USERNAME
ARG GIT_PASSWORD

# goprivate
RUN go env -w  GOPRIVATE=github.com/$GIT_USERNAME/*

# update credentials
RUN git config --global url."https://$GIT_USERNAME:$GIT_PASSWORD@github.com".insteadOf "https://github.com"
RUN echo "machine github.com login $GIT_USERNAME password $GIT_PASSWORD" > /root/.netrc ;

# Make the netrc file only readable by the owner
RUN chmod 600 /root/.netrc

# pre-copy/cache go.mod for pre-downloading dependencies and
# only redownloading them in subsequent builds if they change
COPY go.mod go.sum .
COPY . .

# install dependencies
RUN go mod download

# build your application
RUN go build -o awesome-app

# Run the app
CMD ["awesome-app"]