add a usages of dnsvizor, as suggested by @dinosaure

articles/dnsvizor01.md

@@ -73,6 +73,25 @@ We are now curious on concrete usages of dnsmasq and the configurations you use.
 If you're interested in dnsvizor, please [open an issue at our repository](https://github.com/robur-coop/dnsvizor/issues/new)
 with your dnsmasq configuration. This will help us to guide which parts of the configuration to prioritize.
 
+## Usages of DNSvizor
+
+We have several use cases for DNSvizor:
+- at your home router to provide DNS resolution and DHCP service, filtering ads,
+- in the datacenter auto-configuring your machine park,
+- when running your unikernel swarm to auto-configure them.
+
+The first one is where pi-hole as well fits into, and where dnsmasq is used quite
+a lot. The second one is also a domain where dnsmasq is used. The third one is
+from our experience that lots of people struggle with deploying MirageOS
+unikernels since they have to manually do IP configuration etc. We ourselves
+also pass additional information to the unikernels, such as syslog host,
+monitoring sink, X.509 certificates or host names, do some DNS provisioning, ...
+
+With DNSvizor we will leverage the common configuration options of all
+unikernels (reducing the need for boot arguments), and also go a bit further
+and make deployment seamless (including adding hostnames to DNS, forwarding
+from our reverse TLS proxy, etc.).
+
 ## Conclusion
 
 [DNSvizor](https://github.com/robur-coop/dnsvizor) provides DNS resolution and