add technical FAQ

Author: vmleon

FAQ.md

@@ -0,0 +1,15 @@
+# FAQ
+
+## Technical help
+
+### Get the Load Balancer Public IP address
+
+```bash
+kubectl get service -n ingress-nginx -o jsonpath='{.items[?(@.spec.type=="LoadBalancer")].status.loadBalancer.ingress[0].ip}'
+```
+
+### Get the `dockerconfigjson` from the secret
+
+```bash
+kubectl get secret ocir-secret --output="jsonpath={.data.\.dockerconfigjson}" | base64 --decode | jq
+```