# Don't

# FROM alpine

# Do

# Pin the version

# FROM alpine:3.9

# USAGE

# docker build -t my-alpine -f 010-Dockerfile.from.sample .

# OR Use ARG to set it at build time

ARG version=3.9

FROM alpine:${version}

# USAGE

# docker build --build-arg version=3.7 -t my-alpine -f 010-Dockerfile.from.sample .