When copying files to a destination directory, the classic builder requires
the destination to have a trailing slash (to indicate the target is a _directory_.
not a filename). BuildKit is a bit more flexible in this, and will assume the
target is a directory, but users following the example with buildkit disabled
might see an error message, e.g.:
Sending build context to Docker daemon 3.072kB
Step 1/2 : FROM busybox
---> 69593048aa3a
Step 2/2 : COPY *.go .
When using COPY with more than one source file, the destination must be a directory and end with a /
It doesn't hurt to be explicit, so this patch updates some examples to prevent
this.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>