ADDS: adding nested TOCs in deployment_guide.md

doc/deployment_guide/deployment_guide.md

@@ -3,8 +3,26 @@ The guide includes the details on configuring and installing the machine, instal
 configuring MicroK8s, and deploying and reporting the status of the TeraFlowSDN 
 controller.
 
-- [1.1. Configure your Machine](./1.-Deployment-Guide/1.1.-Configure-your-Machine)
-- [1.2. Install MicroK8s](./1.-Deployment-Guide/1.2.-Install-MicroK8s)
-- [1.3. Deploy TeraFlowSDN](./1.-Deployment-Guide/1.3.-Deploy-TeraFlowSDN)
-- [1.4. WebUI and Grafana Dashboards](./1.-Deployment-Guide/1.4.-WebUI-and-Grafana-Dashboards)
-- [1.5. Show Deployment and Logs](./1.-Deployment-Guide/1.5.-Show-Deployment-and-Logs)
+# 1.1. Configure your Machine
+
+In this section, we describe how to configure a machine (physical or virtual) to be used as the deployment, execution, and development environment for the ETSI TeraFlowSDN controller. Choose your preferred environment below and follow the instructions provided.
+
+**NOTE**: If you already have a remote physical server fitting the requirements specified in this section feel free to use it instead of deploying a local VM. Check [1.1.1. Physical Server](./1.1.-Configure-your-Machine/1.1.1.-Physical-Server) for further details.
+
+Virtualization platforms tested are:
+## 1.1.1. Physical Server
+
+## 1.1.2. Oracle Virtual Box
+
+## 1.1.3. VMWare Fusion
+
+## 1.1.4. OpenStack
+
+## 1.1.5. Vagrant Box
+
+Other virtualization environments might be used; in that case, you will need to adapt these instructions to your particular case. If you want to contribute with details on how you used other hypervisors or platforms, [contact](https://labs.etsi.org/rep/tfs/controller/-/wikis/home#contact) the TFS team through Slack.
+
+# 1.2. Install MicroK8s
+# 1.3. Deploy TeraFlowSDN
+# 1.4. WebUI and Grafana Dashboards
+# 1.5. Show Deployment and Logs