Add ClearML Serving 1.1 release notes (#323)

docs/release_notes/ver_1_1.md

@@ -2,6 +2,49 @@
 title: Version 1.1
 ---
 
+### ClearML Serving 1.1.0 
+
+:::warning Backwards Compatibility
+This release is not backwards compatible - see notes below on upgrading
+:::
+
+**Breaking Changes**
+* Triton engine size supports variable request size (-1)
+
+**Features & Bug Fixes**
+
+* Add version number of serving session task
+* Triton engine support for variable request (matrix) sizes
+* Triton support, fix `--aux-config` to support more configurations elements
+* Huggingface Transformer support
+* `Preprocess` class as module (see note below)
+
+:::important Preprocess Class
+To add a `Preprocess` class from a module (the entire module folder will be packaged)
+
+```
+preprocess_folder
+├── __init__.py  # from .sub.some_file import Preprocess
+└── sub
+    └── some_file.py
+```
+Pass the top folder as a path for --preprocess, for example:
+
+```bash
+clearml-serving module --id <serving_session_id> add --preprocess /path/to/preprocess_folder ...
+```
+:::
+
+**Upgrading from v1.0**
+
+1. Take down the serving containers (`docker-compose` or k8s)
+1. Update the `clearml-serving` CLI `pip3 install -U clearml-serving`
+1. Re-add a single existing endpoint with `clearml-serving module add ... ` (press yes when asked). It will upgrade the 
+   `clearml-serving` session definitions
+1. Pull the latest serving containers (`docker-compose pull ...` or k8s)
+1. Re-spin serving containers (`docker-compose` or k8s)
+
+
 ### ClearML Agent 1.1.2
 
 **Bug Fixes**