README: add reference to contribution guidelines

Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>

diff --git a/README.md b/README.md
index 3c035ef6b6bf7291437bce92ff5e132bdc411d3e..38b5eecfe04c7e3489c02a18fe13603f81ca560b 100644 (file)
--- a/README.md
+++ b/README.md
@@ -31,6 +31,11 @@ There are several ways to contact us:
   https://alioth-lists-archive.debian.net/pipermail/pkg-shadow-commits/),
   only used for historical purposes
 
+## Contributions
+
+Contributions are welcome. Follow the
+[guidelines](doc/contributions/introduction.md) before posting any patches.
+
 ## Authors and maintainers
 Authors and maintainers are listed in [AUTHORS.md](
 https://github.com/shadow-maint/shadow/blob/master/AUTHORS.md).