fix/.env example + delete .vscode folder

.env.example

@@ -1,4 +1,7 @@
-mongoURI='mongodb://localhost:27017/'
-database='nameOfDatabase'
+MONGO_URI='mongodb://localhost:27017/'
+DATABASE='nameOfDatabase'
 PORT=8000
-secret='123456789'
+SECRET='123456789'
+GEOLOCATION_API='api_key'
+EMAIL_USER=mail@example.com
+EMAIL_PASS='password'