diff --git a/docs/index.md b/docs/index.md
index e9b7a098..da6619f4 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -7,28 +7,31 @@ Microservices architectures rely on DevOps practices, automation, CI/CD (continu
 
 1. [Introduction. Openshift VS Kubernetes](introduction.md)
 2. [CI/CD](cicd.md)
-3. [Jenkins 😀](jenkins.md)
-    - [Performance Testing with Jenkins and JMeter](performance-testing-with-jenkins-and-jmeter.md)
-    - [Jenkins and Openshift. Demos](jenkins-and-openshift.md)
-4. [Docker](docker.md)
-5. [Kubernetes](kubernetes.md)
-6. [Openshift 🌟🌟🌟](openshift.md)
+3. [Docker](docker.md)
+4. [Kubernetes](kubernetes.md)
+5. [Openshift 🌟🌟🌟](openshift.md)
     - [List of Openshift Compliant Docker images. Demos](openshift-compliant-images.md)
     - [Monitoring and Performance](monitoring.md)
     - [Java and Java Performance Optimization](java-and-java-performance-optimization.md)
     - [Troubleshooting openshift network performance](troubleshooting-openshift-network-performance.md)
-7. [SonarQube](sonarqube.md)
-8. [Nexus](nexus.md)
-9. [Maven](maven.md)
-10. [Git](git.md)
-11. [Visual Studio](visual-studio.md)
-12. [Terraform](terraform.md)
-13. [Ansible](ansible.md)
-14. [Groovy](groovy.md)
-15. [APIs and RESTful Architecture](apis-and-restful-architecture.md)
+6. [Jenkins 😀](jenkins.md)
+    - [Performance Testing with Jenkins and JMeter](performance-testing-with-jenkins-and-jmeter.md)
+    - [Jenkins and Openshift. Demos](jenkins-and-openshift.md)
+    - [Groovy](groovy.md)
+7. Toolchain
+    - [Maven](maven.md)
+    - [SonarQube](sonarqube.md)
+    - [Nexus](nexus.md)
+8. Configuration Management
+    - [Terraform](terraform.md)
+    - [Ansible](ansible.md)
+9. Dev Environment    
+    - [Git](git.md)
+    - [Visual Studio](visual-studio.md)
+    - [Linux Dev Environment](linux-dev-env.md)
+10. [APIs and RESTful Architecture](apis-and-restful-architecture.md)
     - [Swagger code generator for REST APIs](swagger-code-generator-for-rest-apis.md)
-16. [Public Cloud Solutions](public-cloud-solutions.md)
-17. [Linux Dev Environment](linux-dev-env.md)
-18. [E-Learning](elearning.md)
-19. [Customer Success Stories 🌟](customer.md)
-20. [Newsfeeds](newsfeeds.md)
+11. [Public Cloud Solutions](public-cloud-solutions.md)
+12. [E-Learning](elearning.md)
+13. [Customer Success Stories 🌟](customer.md)
+14. [Newsfeeds](newsfeeds.md)