Nginx installation issue

HI Team,

I have installed jitsi-meet using the default steps given on the following link, but unable to resolve the SSL configuration issue.

https://jitsi.org/downloads/ubuntu-debian-installations-instructions/

Now I have installed Nginx on the same server, but I am unable to start the nginx service. it is giving me the following errors:
nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2019-04-29 07:20:44 UTC; 15s ago
Docs: man:nginx(8)
Process: 20953 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=1/FAILURE)
Process: 20942 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)

Apr 29 07:20:42 jitsimeet nginx[20953]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Apr 29 07:20:42 jitsimeet nginx[20953]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Apr 29 07:20:43 jitsimeet nginx[20953]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Apr 29 07:20:43 jitsimeet nginx[20953]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Apr 29 07:20:43 jitsimeet nginx[20953]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Apr 29 07:20:43 jitsimeet nginx[20953]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Apr 29 07:20:44 jitsimeet nginx[20953]: nginx: [emerg] still could not bind()
Apr 29 07:20:44 jitsimeet systemd[1]: nginx.service: Control process exited, code=exited status=1
Apr 29 07:20:44 jitsimeet systemd[1]: nginx.service: Failed with result ‘exit-code’.
Apr 29 07:20:44 jitsimeet systemd[1]: Failed to start A high performance web server and a reverse proxy server.

Kindly tell me the solutions.

More information about the issue, I can see the ports are utilized by following services,
tcp6 0 0 :::80 ::: * LISTEN 22955/java
tcp6 0 0 :::8080 ::: * LISTEN 22955/java
tcp6 0 0 :::443 ::: * LISTEN 22955/java

When you install jitsi-meet and there is no apache or nginx installed it configures internal jetty as a webserver, that’s why you see java is listening to port 80 and 443.

If you want to use nginx with jitsi-meet, the easiest way is to purge your installation and start over, but this time with nginx installed.

Use the quick install guide for the installation and uninstallation steps: https://github.com/jitsi/jitsi-meet/blob/master/doc/quick-install.md

Thank you Damencho for your help.

I have installed the Nginx and configured it. Now my SSL and domain are working fine.

Thank you again.