Be clearer in docs about COPY/ADD dirs
COPY/ADD just copies the contents of dirs, not dirs themselves.
This PR tries to clear that up in the docs.
Closes
@@ -420,8 +420,10 @@ The copy obeys the following rules:
appropriate filename can be discovered in this case (`http://example.com`
will not work).
-- If `<src>` is a directory, the entire directory is copied, including
- filesystem metadata.
+- If `<src>` is a directory, the entire contents of the directory are copied,
+ including filesystem metadata.
+> **Note**:
+> The directory itself is not copied, just its contents.
- If `<src>` is a *local* tar archive in a recognized compression format
(identity, gzip, bzip2 or xz) then it is unpacked as a directory. Resources
@@ -480,8 +482,10 @@ The copy obeys the following rules:
`docker build` is to send the context directory (and subdirectories) to the
docker daemon.
-- If `<src>` is a directory, the entire directory is copied, including
- filesystem metadata.
+- If `<src>` is a directory, the entire contents of the directory are copied,
+ including filesystem metadata.
+> **Note**:
+> The directory itself is not copied, just its contents.
- If `<src>` is any other kind of file, it is copied individually along with
its metadata. In this case, if `<dest>` ends with a trailing slash `/`, it
