Doksi kiegészítés

overwiew.md

@@ -24,6 +24,10 @@ Some system calls or solutions are UNIX/Linux specific.
 
 The server is only able to serve A, AAAA, CNAME and TXT records.
 
+## Build
+
+Just run make (with CONF=Release optionally).
+
 ## Install
 
 It does not really have a real installation process but there are some circumstances that should be set.
@@ -35,7 +39,7 @@ The following commands may be used to set the user stuff:
 sudo useradd --no-create-home --user-group --system dnsuser
 sudo chown my-user:dnsuser dns.db
 chmod g=r dns.db
-```
+```:wq
 
 ### The database
 
@@ -48,6 +52,8 @@ In the database the `record` table should exist as the following:
 |  type   | text   |   not null                   |
 | content | text   |   not null                   |
 
+## User manual
+It is simple so there is no separate manual for this. Just run dns_server with -h flag.
 
 ## Other