Added documentation for git support in storage initializer. (#581)

* Added documentation for git support in storage initializer.

Signed-off-by: Horvath Agoston <horvath.agoston@gmail.com>

* Added forgotten references to git storage.

Signed-off-by: Horvath Agoston <horvath.agoston@gmail.com>

---------

Signed-off-by: Horvath Agoston <horvath.agoston@gmail.com>

Author: agoston

docs/model-serving/storage/overview.md

@@ -25,6 +25,7 @@ KServe can serve models from various storage locations, including:
 
 ### Other Storage Options
 - **[URI/HTTP(S)](./providers/uri.md)** - Serve models from HTTP or HTTPS URIs.
+- **[Git](./providers/git.md)** - Serve models from git repositories.
 - **[Persistent Volume Claims (PVC)](./providers/pvc.md)** - Use Kubernetes PVCs to store and serve models.
 - **[Hugging Face](./providers/hf.md)** - Directly serve models from the Hugging Face model hub.
 - **[OCI Images](./providers/oci.md)** - Package and serve models as OCI container images using Modelcars.

docs/model-serving/storage/providers/git.md

@@ -0,0 +1,40 @@
+---
+title: Git
+description: Deploy models to KServe InferenceService from git repository.
+---
+
+# Deploy InferenceService with a saved model from a URI
+
+Git download supports https protocol only and no branches.
+
+To use it, specify the model url in the following format: `https://github.com/kserve/kserve.git`
+
+Specify username via either the environment variables `GIT_USERNAME`, or directly in the URL: `https://username@github.com/kserve/kserve.git`. When both present, username from URL takes precedence.
+
+Specify password via the `GIT_PASSWORD` environment variable. Note that password via URL will be ignored.
+
+
+# Password considerations
+
+You should keep the password in a k8s `Secret`, e.g.:
+
+```bash
+kubectl create secret generic git-secret --from-literal=GIT_PASSWORD='yolo'
+```
+
+Which you can refer to like this:
+
+```yaml
+apiVersion: serving.kserve.io/v1beta1
+kind: InferenceService
+spec:
+  predictor:
+    model:
+      env:
+        - name: GIT_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: git-secret
+              key: GIT_PASSWORD
+              optional: false
+```

sidebars.ts

@@ -286,6 +286,7 @@ const sidebars: SidebarsConfig = {
                 'model-serving/storage/providers/azure',
                 'model-serving/storage/providers/s3/s3',
                 'model-serving/storage/providers/gcs',
+                'model-serving/storage/providers/git',
                 'model-serving/storage/providers/uri',
                 'model-serving/storage/providers/pvc',
                 'model-serving/storage/providers/oci',