feat(k8s): add external secret for geo-service

Creates an ExternalSecret for the geo-service to manage 
sensitive information through an external secrets store. 
Removes the legacy create-secrets script and updates 
references in the deployment configuration to use the 
new secret. This enhances security and maintainability 
by centralizing secret management.

k8s/secrets.yaml

@@ -0,0 +1,14 @@
+apiVersion: external-secrets.io/v1beta1
+kind: ExternalSecret
+metadata:
+  name: geo-service
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    name: external-secrets
+    kind: ClusterSecretStore
+  target:
+    creationPolicy: Owner
+  dataFrom:
+  - extract:
+      key: applications/dancefinder/geo-service