gemma finetune on gpu on gke cloudbuild and instructions (#1388)

* add cloudbuild and readme

* link to official docs in readme.;

ai-ml/llm-finetuning-gemma/README.md

@@ -1,3 +1,6 @@
-# Finetune an LLM with multiple GPUs in GKE samples
+# Tutorial: Finetuning Gemma 2b on GKE using L4 GPUs
 
-TBD
+[Google Kubernetes Engine](https://cloud.google.com/kubernetes-engine).
+
+Visit [Google Cloud documentation](https://cloud.devsite.corp.google.com/kubernetes-engine/docs/tutorials/finetune-gemma-gpu)
+to follow the tutorials.

ai-ml/llm-finetuning-gemma/cloudbuild.yaml

@@ -0,0 +1,19 @@
+# Copyright 2024 Google LLC
+#
+# 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.
+
+steps:
+- name: 'gcr.io/cloud-builders/docker'
+  args: [ 'build', '-t', 'us-docker.pkg.dev/$PROJECT_ID/gemma/finetune-gemma-gpu:1.0.0', '.' ]
+images:
+- 'us-docker.pkg.dev/$PROJECT_ID/gemma/finetune-gemma-gpu:1.0.0'