fix: added .env.example to gitignore.

When setting up, developers should create a new .env file with the contents of this file, but if they happen to modify or delete this file instead, git won't create an issue.

Author: Calesi19

.gitignore

@@ -28,6 +28,8 @@ yarn-error.log*
 # local env files
 .env*.local
 .env
+.env.example
+
 # vercel
 .vercel