"server" directive is not allowed here in /etc/nginx/nginx.conf:1

I have an NGINX docker container with a an nginx.conf file i copy into /etc/nginx/nginx.conf. When i start the container/server, i get the following error:

2023/02/15 16:24:10 [emerg] 1#1: "server" directive is not allowed here in /etc/nginx/nginx.conf:1
nginx: [emerg] "server" directive is not allowed here in /etc/nginx/nginx.conf:1

I looked into it and there are a lot of posts about this error (granted, for different line numbers than "1"), but i don't understand what is wrong with this config. As far as i understand, the minimum "correct" nginx config should have this structure:

events {
    ...
}
http {
    ...
    server {
        ...
    }
}

with the events part being actually optinal too. My config looks like this:

events {
  worker_connections  4096;  ## Default: 1024
}

http {
  server {
    listen 80;
    location / {
      root   /usr/share/nginx/html;
      index  index.html index.htm;
      try_files $uri $uri/ /index.html;
    }
  }
}

I also tried multiple versions, removing something in every iteration, down to just this (with and without events part):

http {
  server {
    listen 80;
    location / {
      try_files $uri /index.html;
    }
  }
}

and it still gives the exact same error. I rebuild the container and copy the config after every change, so it cannot be that. What am i doing wrong?

As i wrote in the comment, the error indeed was in me rebuilding the image wrong, resulting in the changes never showing up in the NGINX config. I somehow build an image with the exact same name than the one i was starting, but it was a different one by ID internally somehow. TLDR; I'm dumb.