Multiple additions and fixes #12

- Unbound ran as `nonrootuser`
- Readme updated
- auth.conf replaced by `USER` and `PASSWORD` env variables
- Removed Nginx section from readme for now
- Reworked entrypoint with more checks
- Malicious IPs and hostnames building is done at Docker build to gain time at launch
- docker-compose updated to reflect changes

unbound.conf

@@ -2,8 +2,8 @@ server:
   # See https://www.nlnetlabs.nl/documentation/unbound/unbound.conf/
   # logging
   verbosity: 0
-  val-log-level: 2
-  use-syslog: no
+  val-log-level: 0
+  use-syslog: yes
   
   # performance
   num-threads: 1
@@ -45,6 +45,8 @@ server:
   do-ip4: yes
   do-ip6: no
   interface: 127.0.0.1
+  port: 53
+  username: "nonrootuser"
 
   # other files
   include: "/etc/unbound/blocks-malicious.conf"