Add Doris Schoolhouse and clean pending homelab changes

pihole/rpi4/keepalived.conf.example

@@ -0,0 +1,21 @@
+global_defs {
+    router_id pihole_rpi4
+}
+
+vrrp_instance VI_DNS {
+    state BACKUP
+    interface eth0
+    virtual_router_id 53
+    priority 80
+    advert_int 1
+    nopreempt
+
+    authentication {
+        auth_type PASS
+        auth_pass CHANGE01
+    }
+
+    virtual_ipaddress {
+        10.5.1.53/24
+    }
+}