Is there any way to copy multiple directories in one command, to reduce the number of layers? E.g., instead of:
COPY dirone ./dirone
COPY dirtwo ./dirtwo
COP
That's the documented behavior of the copy command:
If
is a directory, the entire contents of the directory are copied, including filesystem metadata.
Note: The directory itself is not copied, just its contents.
Best workaround I can suggest is to change your directory layout in your build folder, move the three folders under one parent folder and add the parent.