about alpine

python3-alpine/Dockerfile

+FROM alpine
+RUN echo "https://mirror.tuna.tsinghua.edu.cn/alpine/v3.4/main/" > /etc/apk/repositories 
+RUN apk update --no-cache\
+		&& apk add --no-cache python3
+
+RUN cd /usr/bin \
+		&& ln -sf pip3 pip