[lmi][docs] add deepspeed deprecation notice to lmi docs

serving/docs/lmi/announcements/deepspeed-deprecation.md

@@ -0,0 +1,90 @@
+# DeepSpeed deprecation announcement
+
+**Note: This only impacts users that are using the `deepspeed` container that are also using the `DeepSpeed` library for inference.
+If you are using lmi-dist, vLLM, or HuggingFace accelerate in this container, you are not impacted.**
+
+With LMI V10 (0.28.0), we are changing the name from LMI DeepSpeed DLC to LMI (LargeModelInference) DLC. 
+The `deepspeed` container has been renamed to the `lmi` container.
+As part of this change, we have decided to discontinue integration with the DeepSpeed inference library. 
+You can continue to use vLLM or LMi-dist Library with the LMI container. If you plan to use DeepSpeed Library, please follow the steps below, or use LMI V9 (0.27.0).
+
+## Migrating from DeepSpeed
+
+If you are not using DeepSpeed library (through importing) or using DeepSpeed as your inference engine, you can stop reading from here.
+You are leveraging DeepSpeed in the LMI container if you meet any of the following conditions:
+
+You are using the DeepSpeed engine via:
+
+* `engine=DeepSpeed` (serving.properties)
+* `OPTION_ENGINE=DeepSpeed` (environment variable)
+
+You are using the built-in DeepSpeed inference handler:
+
+* `option.entryPoint=djl_python.deepspeed` (serving.properties)
+* `OPTION_ENTRYPOINT=djl_pytyhon.deepspeed` (environment variable)
+
+You are importing `deepspeed` in a custom inference handler (model.py)
+
+```python
+import deepspeed
+```
+
+If none of these conditions apply to your use-case, you can stop reading as you are not impacted.
+
+### Custom inference script (model.py)
+
+If you are using a custom handler (model.py) that is not coming from LMI and you import DeepSpeed like this:
+
+```python
+import deepspeed
+```
+
+You will need to install DeepSpeed manually into our container. Add `deepspeed` to your `requirements.txt` and the model server will install the dependency at runtime. 
+In a network isolated deployment environment, you will need to package the `deepspeed` wheel along with other necessary dependencies with the model.py.
+
+### Built-In Handler 
+
+If you set any of the following configurations:
+
+serving.properties file
+
+```
+engine=DeepSpeed
+```
+
+```
+option.entryPoint=djl_python.deepspeed
+```
+
+environment variables
+
+``` 
+OPTION_ENGINE=DeepSpeed
+```
+
+```
+OPTION_ENTRYPOINT=djl_python.deepspeed
+```
+
+Then you should migrate to:
+
+serving.properties
+
+```
+engine=Python
+option.mpi_mode=true
+```
+
+environment variables
+
+```
+HF_MODEL_ID=<hub model id or s3 uri> (container will auto-detect best engine to use for your model)
+```
+
+
+
+This updated configuration will leverage either `lmi-dist`, `vllm`, or `huggingface accelerate` depending on your model architecture. 
+Most model architectures supported by deepspeed are also supported by `lmi-dist` or `vllm`. These inference libraries should provide increased performance compared to `deepspeed`.
+
+We rename DeepSpeed into more generic as Python + MPI way to better represent the use case. 
+In the meantime, we inherit most of the DeepSpeed feature with our LMI-Dist Engine, including all models DeepSpeed supported today. Please refer to [LMI-Dist Engine guide](../user_guides/lmi-dist_user_guide.md) to start with.

serving/docs/lmi/user_guides/deepspeed_user_guide.md

@@ -2,7 +2,9 @@
 
 > [!WARNING]
 > DeepSpeed support has been removed starting with LMI container release 0.28.0.
-> You should migrate to one of the other supported backends. 
+> You should migrate to one of the other supported backends.  
+> Please see the [migration document](../announcements/deepspeed-deprecation.md) for more details.
+
 
 ## Model Artifacts Structure