[background] read source files
[1/3] FROM docker.io/library/busybox
[background] read source files 26B
[background] read source files 362B [done: 38ms]
[2/3] ADD hi.txt hi.txt
[2/3] ADD hi.txt hi.txt [done: 113ms]
[3/3] RUN head -n hi.txt
  → head: invalid number 'hi.txt'

ERROR IN: [3/3] RUN head -n hi.txt
