docs: add hints for v1 source preference over v0 in contrib guide

CONTRIBUTING.md

@@ -67,8 +67,8 @@ Follow through the next sections to learn about developing a new **source integr
 
 * [Overview of integration development journey](#overview-of-integration-development-journey)
 * [1. Setup rudder-transformer and understand the code structure](#1-setup-rudder-transformer-and-understand-the-code-structure)
-* [2. Write code for a v0 source integration](#2-write-code-for-a-v0-source-integration)
-* [3. Test your v0 source integration](#3-test-your-v0-source-integration)
+* [2. Write code for a source integration](#2-write-code-for-a-source-integration)
+* [3. Test your source integration](#3-test-your-source-integration)
 * [4. Write automated tests](#4-write-automated-tests)
 * [5. Add RudderStack UI configurations in integrations-config](#5-add-rudderstack-ui-configurations-in-integrations-config)
 * [6. Run the transformer locally](#6-run-the-transformer-locally)
@@ -109,13 +109,11 @@ Understand the code structure
 * `test/integrations/destinations` - Integration tests for destination integrations
 
 
-### 2. Write code for a v0 source integration
+### 2. Write code for a source integration
 
-Here, we will explain the code for a v0 source integration but most of the learning will apply to other integrations as well (destination and v1).
+Note: Here, we are using an example of `v0` source integration, so you might see some mentions of the `src/v0` folder. But we recommend to use `src/v1` folder for new source integrations.
 
-
-
-* Create a new directory with the integration name under `src/v0` (follow the snake case naming convention)
+* Create a new directory with the integration name under `src/v1/sources` (follow the snake case naming convention)
 * Add `transform.js`, add a `process(eventData)` function and export it. This is the function which will be called to transform the event data received from the source
 * Add `config.js` to separate the source configuration and mapping
 
@@ -202,7 +200,7 @@ function process(eventPayload) {
 exports.process = process;
 ```
 
-### 3. Test your v0 source integration
+### 3. Test your source integration
 
 
 #### Manual testing