update doc

docs/source/en/modular_diffusers/developer_guide.md

@@ -1,6 +1,22 @@
+<!--Copyright 2024 The HuggingFace Team. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+the License. You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+specific language governing permissions and limitations under the License.
+-->
+
 # Developer Guide: Building with Modular Diffusers
 
-To implement new pipelines in the modular framework, you can use this process:
+[[open-in-colab]]
+
+In this tutorial we will walk through the process of adding a new pipeline to the modular framework using differential diffusion as our example. We'll cover the complete workflow from implementation to deployment: implementing the new pipeline, ensuring compatibility with existing tools, sharing the code on Hugging Face Hub, and deploying it as a UI node. 
+
+We'll also demonstrate the 3-step framework process we use for implementing new basic pipelines in the modular system.
 
 #### 1. **Start with an existing pipeline as a base**
    - Identify which existing pipeline is most similar to your target