Improve the demo feature of the project

infrastructure/kubernetes/base/secrets/demo-internal-api-key-secret.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: demo-internal-api-key
+  namespace: bakery-ia
+type: Opaque
+stringData:
+  # IMPORTANT: Replace this with a secure randomly generated key in production
+  # Generate with: python3 -c "import secrets; print(secrets.token_urlsafe(32))"
+  INTERNAL_API_KEY: "REPLACE_WITH_SECURE_RANDOM_KEY_IN_PRODUCTION"