you need git push. Just push the modified file to the server.
you need git push to be pushed to the remote server, and git commit is submitted to the local workspace
did you clone it locally?
Git is distributed version management. Both your local and remote version libraries will be available, so the Commit operation will first be pushed to your local version library, and then Push to the remote version library (there can be more than one remote library, and not necessarily the same status as your local library). Push also has a corresponding operation called Pull, which is equivalent to pulling a relatively new part of the remote library locally; then if there is nothing local, it is equivalent to copying the remote library to the local area with a full tail.
by the way, I wonder if you have prepared a remote library? For example, Github, domestic Coding.net are free hosting sites, you can find tutorials to have a look. In addition, remote libraries are not required, and the effect of copying folders directly from a local version library project is the same (in principle, as long as you have a hidden ".git" folder, which is the git version library of the project).
your git add,git commit is just submitted to the local git repository. You need git pull,git push to submit the local modification record to the remote git repository. In this way, if you git clone the remote git repository somewhere else, you will have the files you submitted before
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