fix: JupyterHub/Keycloak demo fixes pre-26.3 (#381)

redo jq command due to distro changes

Author: adwk67

stacks/jupyterhub-keycloak/keycloak.yaml

@@ -61,7 +61,9 @@ spec:
               while :
               do
                 echo "Determining Keycloak public reachable address"
-                KEYCLOAK_ADDRESS=$(kubectl get svc keycloak -o json | jq -r --argfile endpoints <(kubectl get endpoints keycloak -o json) --argfile nodes <(kubectl get nodes -o json) '($nodes.items[] | select(.metadata.name == $endpoints.subsets[].addresses[].nodeName) | .status.addresses | map(select(.type == "ExternalIP" or .type == "InternalIP")) | min_by(.type) | .address | tostring) + ":" + (.spec.ports[] | select(.name == "https") | .nodePort | tostring)')
+                ENDPOINTS=$(kubectl get endpoints keycloak -o json)
+                NODES=$(kubectl get nodes -o json)
+                KEYCLOAK_ADDRESS=$(kubectl get svc keycloak -o json | jq -r --argjson endpoints "$ENDPOINTS" --argjson nodes "$NODES" '($nodes.items[] | select(.metadata.name == $endpoints.subsets[].addresses[].nodeName) | .status.addresses | map(select(.type == "ExternalIP" or .type == "InternalIP")) | min_by(.type) | .address | tostring) + ":" + (.spec.ports[] | select(.name == "https") | .nodePort | tostring)')
                 echo "Found Keycloak running at $KEYCLOAK_ADDRESS"
 
                 if [ ! -z "$KEYCLOAK_ADDRESS" ]; then