How to build Docker image in the Docker container

Dockerfile

FROM alpine:3.8
MAINTAINER Ruslan Popov <[email protected]>

ARG SOURCE_VERSION=UNSPECIFIED
ARG SOURCE_COMMIT=UNSPECIFIED

ENV \
    SOURCE_VERSION=${SOURCE_VERSION} \
    SOURCE_COMMIT=${SOURCE_COMMIT} \

RUN apk update && \
    apk add --no-cache --progress \
        make \
        git \
        docker \
        ca-certificates && \
    rm -rf /var/cache/apk/*

COPY ca.pem /usr/local/share/ca-certificates/halfakop.crt
RUN update-ca-certificates