Update Summary to add Infra sections

Author: dicortazar

SUMMARY.md

@@ -6,6 +6,11 @@
   * [Framework](introduction/framework.md)
   * [Authors and Reviewers](introduction/authors.md)
 * [Infrastructure](infrastructure/infrastructure.md)
+  * [Basic Infrastructure](infrastructure/infrastructure.md#basic-infrastructure)
+    * [Development Process](infrastructure/infrastructure.md#development-process-infrastructure)
+    * [Communication Channels](infrastructure/infrastructure.md#communication-channels-infrastructure)
+    * [Monitoring](infrastructure/infrastructure.md#monitoring-infrastructure)
+  * [Comparing How Inner-Sourced Your Infra Is](infrastructure/infrastructure.md#comparing-how-inner-sourced-your-infrastructure-is)
   * [Authors and Reviewers](infrastructure/authors.md)
 * [What, When and How to Measure](measuring/introduction.md)
   * [Goals using Metrics](measuring/goals.md)