// Aula 10 - Construindo uma imagem do zero

$ mkdir -p ~/fod/test && cd ~/fod/test

$ mkdir sample1 && cd sample1

# vim Dockerfile

FROM centos:7
RUN yum install -y wget

# docker image build -t my-centos .

$ docker image build -t my-centos -f Dockerfile .

vim hello.c

#include <stdio.h>
int main (void)
{
	printf ("Hello, world!\n");
	return 0;
}

# vim Dockerfile

FROM alpine:3.7
RUN apk update &&
apk add --update alpine-sdk
RUN mkdir /app
WORKDIR /app
COPY . /app
RUN mkdir bin
RUN gcc -Wall hello.c -o bin/hello
CMD /app/bin/hello

$ docker image build -t hello-world .

$ docker image ls | grep hello-world

FROM alpine:3.7 AS build
RUN apk update && \
apk add --update alpine-sdk
RUN mkdir /app
WORKDIR /app
COPY . /app
RUN mkdir bin
RUN gcc hello.c -o bin/hello
FROM alpine:3.7
COPY --from=build /app/bin/hello /app/hello
CMD /app/hello

# docker image build -t hello-world-small .

# docker image ls | grep hello-world

# mkdir backup

$ docker image save -o ./backup/my-alpine.tar my-alpine

# docker image load -i ./backup/my-alpine.tar