UI is not available 403 forbidden

[Tatyanka]

{"build_id": "2014-10-13_16-58-26", "ostf_sha": "1795445bcd30ae26111e760b284078e5688f322f", "build_number": "29", "auth_required": true, "api": "1.0", "nailgun_sha": "764bf8c057b8fc5a91c3ae1d55678f4fe53fa7db", "production": "docker", "fuelmain_sha": "c50f4d4963ee08cf85055b8ea6cc5ac575f6c1d0", "astute_sha": "980456ba80b49a7e3f237a299e52d4ab214f6f72", "feature_groups": ["mirantis"], "release": "6.0", "release_versions": {"2014.2-6.0": {"VERSION": {"build_id": "2014-10-13_16-58-26", "ostf_sha": "1795445bcd30ae26111e760b284078e5688f322f", "build_number": "29", "api": "1.0", "nailgun_sha": "764bf8c057b8fc5a91c3ae1d55678f4fe53fa7db", "production": "docker", "fuelmain_sha": "c50f4d4963ee08cf85055b8ea6cc5ac575f6c1d0", "astute_sha": "980456ba80b49a7e3f237a299e52d4ab214f6f72", "feature_groups": ["mirantis"], "release": "6.0", "fuellib_sha": "253a04d172bebaf9d199426129043353172318f2"}}}, "fuellib_sha": "253a04d172bebaf9d199426129043353172318f2"}

This is custom iso: all repos from master and 1 patch for library for dhcp cond

Steps to reproduce:
1. Setup master node
2. Navigate to UI

Actual Result:
403 forbidden error on UI.
2014/10/14 10:10:57 [info] 373#0: *20 client closed prematurely connection while reading client request line, client: 172.17.42.1, server: localhost
2014/10/14 10:12:35 [error] 373#0: *21 "/usr/share/nailgun/static/index.html" is forbidden (13: Permission denied), client: 172.17.42.1, server: localhost, request: "GET / HTTP/1.1", host: "10.20.0.2:8000"
2014/10/14 10:12:47 [error] 373#0: *22 "/usr/share/nailgun/static/index.html" is forbidden (13: Permission denied), client: 172.17.42.1, server: localhost, request: "GET / HTTP/1.1", host: "10.20.0.2:8000"
2014/10/14 10:12:47 [error] 373#0: *22 "/usr/share/nailgun/static/index.html" is forbidden (13: Permission denied), client: 172.17.42.1, server: localhost, request: "GET / HTTP/1.1", host: "10.20.0.2:8000"
2014/10/14 10:12:47 [error] 373#0: *22 "/usr/share/nailgun/static/index.html" is forbidden (13: Permission denied), client: 172.17.42.1, server: localhost, request: "GET / HTTP/1.1", host: "10.20.0.2:8000"
2014/10/14 10:12:57 [info] 373#0: *23 client closed prematurely connection while reading client request line, client: 172.17.42.1, server: localhost
as soon as permition was provided UI works fine