Add .dropboxignore directory to exclude folders without using selective sync

Most developers use Git for version control but I personally like to also work directly on a Dropbox folder so all my files are backed up before I push my code. The problem is that most of the projects use packages which usually no one benefits from synchronizing them so it would be great if Dropbox made an exception for these folders so they don’t back up by default unless explicitly told to do so.

Usually these folders take quite some time to synchronize with other computers and I think it is pointless to back them up not because of the storage they take but because they are thousands and thousands of files.

Before I tried to exclude those folders from synchronizing, but it that’s too much work just exclude a folder that later on will be replaced and then you have to do the same job over and over again.that’s too much work just to exclude a folder that later on will be replaced and then you’d have to do the same job over and over again. Even worse once it corrupted my entire dropbox folder and I had to re-synchronize everything.

* EDIT: I didn't even consider it but since my idea was merged with this idea, a .dropboxignore file would be the best solution here.