I generally prefer opening remote files from a local Emacs instance.
While running Emacs on your local machine, opening a remote file over ssh is not much different than opening any other file besides a slightly different syntax.
For ssh, you can type C-x C-f. Now, in the minubuffer you want to type /ssh:user@host:/path/to/file (Note that tab completion will work once you start typing a path. Also note the leading / character). See the full docs here.
In your example, that would be:
C-x C-f /ssh:user@192.168.1.5:/usr/share/nginx/html/index.html
Now you can edit remote files over ssh in Emacs while using your local configuration and any installed packages, etc…