Added a step to create namespace if it does not exist

.github/workflows/deploy_helm_chart.yaml

@@ -1,6 +1,9 @@
 name: Deploy Helm Chart to FNS GKE
 
 on:
+  push:
+    branches:
+      - devops/FAIRSPC-23_deployment
   workflow_dispatch:
     inputs:
       name:
@@ -85,6 +88,16 @@ jobs:
             echo "StatefulSet fairspace does not exist."
           fi 
 
+      - name: Check if namespace exists
+        id: check_namespace
+        run: |
+          if kubectl get namespace fairspace-${{ env.ENVIRONMENT }} &> /dev/null; then
+            echo "Namespace fairspace-${{ env.ENVIRONMENT }} exists."
+          else
+            echo "Namespace fairspace-${{ env.ENVIRONMENT }} does not exist. Creating namespace."
+            kubectl create namespace fairspace-${{ env.ENVIRONMENT }}
+          fi
+
       - name: Deploy Helm chart
         run: |
           helm upgrade --install fairspace oci://${{ vars.HELM_REGISTRY }}/fairspace \