chore(nginx): default server for helath checks

Creating separate health check server, as not to pollute the prom
metrics.

Signed-off-by: Rajesh Rajendran <rjshrjndrn@gmail.com>

scripts/helmcharts/openreplay/charts/nginx-ingress/templates/configMap.yaml

@@ -138,9 +138,17 @@ data:
       default $http_x_forwarded_proto;
       '' $scheme;
     }
+    # Default server for helath check
     server {
       listen 80 default_server;
       listen [::]:80;
+      location /healthz {
+        return 200 'OK';
+      }
+    }
+    server {
+      listen 80;
+      listen [::]:80;
       server_name {{ .Values.global.domainName }};
       {{ .Values.customServerConfigs }}
       include /etc/nginx/conf.d/location.list;