docker build -t python-test:latest . Sending build context to Docker daemon 3.072kB Step 1/4 : FROM alpine:3.7 ---> 70cb411a7a13 Step 2/4 : RUN apk --update-cache add musl linux-headers gcc g++ make gfortran openblas-dev python3 python3-dev ---> Running in f429cc126e22 fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/commun