Add table of content pre-commit hook

.pre-commit-config.yaml

@@ -0,0 +1,5 @@
+repos:
+  - repo: https://github.com/Lucas-C/pre-commit-hooks-nodejs
+    rev: v1.1.2
+    hooks:
+      - id: markdown-toc

README.md

@@ -7,6 +7,24 @@ go [through currently supported methods in Swagger](https://allburov.github.io/w
 
 The project is an HTTP API wrapper around https://github.com/orkestral/venom
 
+# Tables of Contents
+
+<!-- toc -->
+
+- [Installation](#installation)
+- [First Steps](#first-steps)
+  * [Run WhatsAPP HTTP API](#run-whatsapp-http-api)
+  * [Create a new session and login](#create-a-new-session-and-login)
+  * [Send a text message](#send-a-text-message)
+- [Receive messages](#receive-messages)
+    + [Python echo server](#python-echo-server)
+- [Environment variables](#environment-variables)
+  * [Common](#common)
+  * [Webhooks](#webhooks)
+  * [File storage](#file-storage)
+- [Support](#support)
+
+<!-- tocstop -->
 
 # Installation