构建镜像
FROM nginx
RUN echo '<h1>Hello, Docker!</h1>' > /usr/share/nginx/html/index.htmlFROM 指定基础镜像
构建镜像
$ docker build -t nginx:v3 .
Sending build context to Docker daemon 2.048 kB
Step 1 : FROM nginx
---> e43d811ce2f4
Step 2 : RUN echo '<h1>Hello, Docker!</h1>' > /usr/share/nginx/html/index.html
---> Running in 9cdc27646c7b
---> 44aa4490ce2c
Removing intermediate container 9cdc27646c7b
Successfully built 44aa4490ce2c镜像构建上下文(Context)
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