Update community page with source repositories and mirrors

Update source repository with regular and mirror repository
Add website source repository and its regular and mirror repository
diff --git a/_data/project.yml b/_data/project.yml
index 14d8222..ed001f0 100644
--- a/_data/project.yml
+++ b/_data/project.yml
@@ -30,6 +30,10 @@
 
 jira: SYSTEMML
 
-source_repository: https://github.com/apache/incubator-systemml
+source_repository: https://git-wip-us.apache.org/repos/asf/incubator-systemml.git
+source_repository_mirror: https://github.com/apache/incubator-systemml
+
+website_repository: https://git-wip-us.apache.org/repos/asf/incubator-systemml-website.git
+website_repository_mirror: https://github.com/apache/incubator-systemml-website
 
 podling: true
\ No newline at end of file
diff --git a/community.md b/community.md
index 93d4340..37cfe59 100644
--- a/community.md
+++ b/community.md
@@ -57,9 +57,9 @@
 
 ### Source Code
 
-The project sources are accessible via the [source code repository]({{ site.data.project.source_repository }})
+The project sources are accessible via the [source code repository]({{ site.data.project.source_repository }}) which is also mirrored in [GitHub]({{ site.data.project.source_repository_mirror }})
 
 
+### Website Source Code
 
-
-
+The project website sources are accessible via the [website source code repository]({{ site.data.project.website_repository }}) which is also mirrored in [GitHub]({{ site.data.project.website_repository_mirror }})