ginx | Simple reverse proxy for virtual hosting | HTTP library

I had run container on my local.

When I type "localhost:80" in my browser, it opens the website page which I had loaded through container.( i have attached content of localhost below ).

Issue : Not able to stop the running container.

Tried commands : -> docker container ls ----prints nothing, just header of the tables

-> docker container ls -a ---- prints container that I had loaded.

-> docker ps ---- prints nothing, just header of the tables

-> docker ps -a ---- prints container that I had loaded.

-> docker stop dockerName ---- > in my case docker name is , "my-first-ginx"

-> docker stop dockerId ----> in my case docker id is , 05de0a976988

-> docker kill dockerId --- > Got an Error message, described as below ,

Error response from daemon: Cannot kill container: 05de0a976988: Container 05de0a976988d1c323981bcbc342dfc9cec79a08162e6ec4de184dad5289cfc5 is not running

First Screenshot is proof that there exists container named "my-first-nginx"

Third Screenshot is proof that it's still running when I hit on localhost:80

Second screenshot is proof that I can't kill that container, because it's not running.

I have started learning docker today only, so pls someone help, what mistake I am making ?

UPDATE :

After removing all the stopped containers , still I am getting the website page on "localhost:80" .

I am trying to use regex with nginx to allow requests containing some conditions without success.

for example one of the errors ginx: [emerg] pcre_compile() failed: missing ) in "(^/(unsafe)\/([0-9]" in /etc/nginx/sites-enabled/file.conf:33.

The regex should be ok according to https://regex101.com/, so I guess the issue with the nginx and this regex, so I need some help how to do it.

Regex:

Follow this document http://docs.sulu.io/en/latest/book/getting-started.html at the end of installation process I got this error: