minecraft: Add server MOTD

roles/minecraft/files/server.properties

@@ -1,5 +1,4 @@
 #Minecraft server properties
-#Mon Mar 07 18:44:22 UTC 2022
 enable-jmx-monitoring=false
 rcon.port=25575
 level-seed=
@@ -8,7 +7,7 @@ enable-command-block=false
 enable-query=false
 generator-settings={}
 level-name=world
-motd=A Minecraft Server
+motd=A foo.sh Minecraft Server
 query.port=25565
 pvp=true
 generate-structures=true