docs: call out ONBUILD COPY --from as unsupported

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>
moby · Mar 28, 2024 · 15e781c · 15e781c
1 parent 012beff
commit 15e781c
Showing 1 changed file with 4 additions and 8 deletions.
diff --git a/frontend/dockerfile/docs/reference.md b/frontend/dockerfile/docs/reference.md
@@ -2480,15 +2480,11 @@ ONBUILD ADD . /app/src
 ONBUILD RUN /usr/local/bin/python-build --dir /app/src
 ```
 
-> **Warning**
->
-> Chaining `ONBUILD` instructions using `ONBUILD ONBUILD` isn't allowed.
-{ .warning }
+### ONBUILD limitations
 
-> **Warning**
->
-> The `ONBUILD` instruction may not trigger `FROM` or `MAINTAINER` instructions.
-{ .warning }
+- Chaining `ONBUILD` instructions using `ONBUILD ONBUILD` isn't allowed.
+- The `ONBUILD` instruction may not trigger `FROM` or `MAINTAINER` instructions.
+- `ONBUILD COPY --from` is not supported.
 
 ## STOPSIGNAL