Merge pull request 'updated documentation' (#2) from oct-update into master

Reviewed-on: #2

README.md

@@ -61,6 +61,18 @@ kubectl apply --context kind-dnet-data-platform -f ./clusters/local/nginx-kind-d
     ```console
     terraform init
     ````
+- Build and add the Docker image of Spark-Operator:
+        
+    ```console
+    cd docker-images/spark-operator
+    docker build -t spark-operator:2.0.2 . && kind load docker-image -n dnet-data-platform spark-operator:2.0.2
+    ```
+
+    ```console
+    cd docker-images/spark-image
+    docker build -t dnet-spark:1.0.0 . && kind load docker-image -n dnet-data-platform dnet-spark:1.0.0
+    ```
+
 - Create the cluster:
     ```console 
      terraform apply -var-file="local.tfvars"