Nginx 502 bad gateway about vessel HOT 2 CLOSED

root@Kali:/var/www/webuilder-api# ./vessel logs app
Attaching to webuilderapi_app_1
app_1    | usermod: UID '0' already exists
app_1    | /usr/lib/python2.7/dist-packages/supervisor/options.py:297: UserWarning: Supervisord is running as root and it is searching for its configuration file in default locations (including its current working directory); you probably want to specify a "-c" argument specifying an absolute path to a configuration file for improved security.
app_1    |   'Supervisord is running as root and it is searching '
app_1    | 2018-03-19 13:25:45,036 CRIT Supervisor running as root (no user in config file)
app_1    | 2018-03-19 13:25:45,036 WARN Included extra file "/etc/supervisor/conf.d/supervisord.conf" during parsing
app_1    | 2018-03-19 13:25:45,043 INFO RPC interface 'supervisor' initialized
app_1    | 2018-03-19 13:25:45,043 CRIT Server 'unix_http_server' running without any HTTP authentication checking
app_1    | 2018-03-19 13:25:45,043 INFO supervisord started with pid 12
app_1    | 2018-03-19 13:25:46,045 INFO spawned: 'nginx' with pid 15
app_1    | 2018-03-19 13:25:46,046 INFO spawned: 'php-fpm' with pid 16

app_1    | [19-Mar-2018 13:25:46] ERROR: [pool www] please specify user and group other than root
app_1    | [19-Mar-2018 13:25:46] ERROR: [pool www] please specify user and group other than root
app_1    | [19-Mar-2018 13:25:46] ERROR: FPM initialization failed
app_1    | [19-Mar-2018 13:25:46] ERROR: FPM initialization failed
app_1    | 2018-03-19 13:25:46,080 INFO exited: php-fpm (exit status 78; not expected)
app_1    | 2018-03-19 13:25:47,081 INFO success: nginx entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
app_1    | 2018-03-19 13:25:47,083 INFO spawned: 'php-fpm' with pid 25
app_1    | [19-Mar-2018 13:25:47] ERROR: [pool www] please specify user and group other than root
app_1    | [19-Mar-2018 13:25:47] ERROR: [pool www] please specify user and group other than root
app_1    | [19-Mar-2018 13:25:47] ERROR: FPM initialization failed
app_1    | [19-Mar-2018 13:25:47] ERROR: FPM initialization failed
app_1    | 2018-03-19 13:25:47,137 INFO exited: php-fpm (exit status 78; not expected)
app_1    | 2018-03-19 13:25:49,142 INFO spawned: 'php-fpm' with pid 26
app_1    | [19-Mar-2018 13:25:49] ERROR: [pool www] please specify user and group other than root
app_1    | [19-Mar-2018 13:25:49] ERROR: [pool www] please specify user and group other than root
app_1    | [19-Mar-2018 13:25:49] ERROR: FPM initialization failed
app_1    | [19-Mar-2018 13:25:49] ERROR: FPM initialization failed
app_1    | 2018-03-19 13:25:49,202 INFO exited: php-fpm (exit status 78; not expected)
app_1    | 2018-03-19 13:25:52,207 INFO spawned: 'php-fpm' with pid 27
app_1    | [19-Mar-2018 13:25:52] ERROR: [pool www] please specify user and group other than root
app_1    | [19-Mar-2018 13:25:52] ERROR: [pool www] please specify user and group other than root
app_1    | [19-Mar-2018 13:25:52] ERROR: FPM initialization failed
app_1    | [19-Mar-2018 13:25:52] ERROR: FPM initialization failed
app_1    | 2018-03-19 13:25:52,255 INFO exited: php-fpm (exit status 78; not expected)
app_1    | 2018-03-19 13:25:53,256 INFO gave up: php-fpm entered FATAL state, too many start retries too quickly
app_1    | 2018/03/19 13:25:58 [crit] 21#21: *1 connect() to unix:/run/php/php7.2-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 172.18.0.1, server: _, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/run/php/php7.2-fpm.sock:", host: "localhost"
app_1    | 172.18.0.1 - - [19/Mar/2018:13:25:58 +0000] "GET / HTTP/1.1" 502 173 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0"