Go app template with dumb-init

dockerfile-goapp

FROM centos

ENV DOWNLOADS /home/downloads
ENV TOOLS /home/tools
ENV GOROOT $TOOLS/go
ENV GOPATH /home/go
ENV PATH $GOROOT/bin:$PATH
ENV APP [APP-NAME]

ADD . /home/go/src/$APP

RUN GO_VERSION="go1.8.linux-amd64.tar.gz" && \    
    mkdir $TOOLS && \
    mkdir -p $GOPATH/src && \
    mkdir -p $GOROOT && \
    mkdir -p $DOWNLOADS && \

    curl -o "$DOWNLOADS/$GO_VERSION" "https://storage.googleapis.com/golang/$GO_VERSION" && \
    tar xz -C "$TOOLS" -f "$DOWNLOADS/$GO_VERSION" && \

    yum install -y git && \    
   
    cd /home/go/src/$APP && \
    go get && \
    go test ./... && \
    go build -o /usr/bin/$APP && \
    cd / && \
    
    curl -o /usr/local/bin/dumb-init https://github.com/Yelp/dumb-init/releases/download/v1.2.0/dumb-init_1.2.0_amd64
    chmod +x /usr/local/bin/dumb-init
    
    yum autoremove -y git && \
    yum clean all && \

    rm -rf $TOOLS && \
    rm -rf $GOPATH && \
    rm -rf $DOWNLOADS

WORKDIR /

ENTRYPOINT ["/usr/bin/$APP"]