Merge pull request 'Update 'README.md'' (#5) from imri-gitignore-explain-fix2 into main

Reviewed-on: #5

README.md

@@ -33,3 +33,20 @@ git push -u origin main
 git remote add origin https://git.eurobytes.eu/imri/Test.git
 git push -u origin main
 ```
+# How do I make Git forget about a file that was tracked, but is now in .gitignore?
+
+`.gitignore` will prevent untracked files from being added (without an `add -f`) to the set of files tracked by Git. However, Git will continue to track any files that are already being tracked.
+
+To stop tracking a file, we must remove it from the index:
+
+    git rm --cached <file>
+
+To remove a folder and all files in the folder recursively:
+
+    git rm -r --cached <folder>
+
+The removal of the file from the head revision will happen on the next commit.
+
+**WARNING: While this will not remove the physical file from your local machine, it will remove the files from other developers' machines on their next `git pull`.**
+
+https://stackoverflow.com/a/1274447/1148529