Docker build hang

gistfile1.txt

FROM alpine:latest

RUN mkdir -p ~/.ssh/1
RUN mkdir -p ~/.ssh/2
RUN mkdir -p ~/.ssh/3
RUN mkdir -p ~/.ssh/4
RUN mkdir -p ~/.ssh/5
RUN mkdir -p ~/.ssh/6
RUN mkdir -p ~/.ssh/7
RUN mkdir -p ~/.ssh/8
RUN mkdir -p ~/.ssh/9
RUN mkdir -p ~/.ssh/10
RUN mkdir -p ~/.ssh/11
RUN mkdir -p ~/.ssh/12
RUN mkdir -p ~/.ssh/13
RUN mkdir -p ~/.ssh/14
RUN mkdir -p ~/.ssh/15
RUN mkdir -p ~/.ssh/16
RUN mkdir -p ~/.ssh/17
RUN mkdir -p ~/.ssh/18
RUN mkdir -p ~/.ssh/19
RUN mkdir -p ~/.ssh/20
RUN mkdir -p ~/.ssh/21
RUN mkdir -p ~/.ssh/22
RUN mkdir -p ~/.ssh/23
RUN mkdir -p ~/.ssh/24
RUN mkdir -p ~/.ssh/25
RUN mkdir -p ~/.ssh/26
RUN mkdir -p ~/.ssh/27
RUN mkdir -p ~/.ssh/28
RUN mkdir -p ~/.ssh/29
RUN mkdir -p ~/.ssh/30
RUN mkdir -p ~/.ssh/31
RUN mkdir -p ~/.ssh/32
RUN mkdir -p ~/.ssh/33
RUN mkdir -p ~/.ssh/34
RUN mkdir -p ~/.ssh/35
RUN mkdir -p ~/.ssh/36
RUN mkdir -p ~/.ssh/37
RUN mkdir -p ~/.ssh/38
RUN mkdir -p ~/.ssh/39
RUN mkdir -p ~/.ssh/40
RUN mkdir -p ~/.ssh/41
RUN mkdir -p ~/.ssh/42
RUN mkdir -p ~/.ssh/43
RUN mkdir -p ~/.ssh/44
RUN mkdir -p ~/.ssh/45
RUN mkdir -p ~/.ssh/46
RUN mkdir -p ~/.ssh/47
RUN mkdir -p ~/.ssh/48
RUN mkdir -p ~/.ssh/49
RUN mkdir -p ~/.ssh/50