New demo api spec

Author: camilamaia

demo-api/.env

@@ -1,2 +1,3 @@
-export BASE_URL="http://demo.scanapi.dev/api/"
-export DEMO_KEY="demoKEY123"
+export BASE_URL="http://demo.scanapi.dev/"
+export USER="guest"
+export PASSWORD="demoapi123"

demo-api/README.md

@@ -1,11 +1,12 @@
 # Demo API
 
 [Demo API](https://github.com/scanapi/demo-api) is an API created by the ScanAPI team for demo
-purposes. It can be accessed at https://demo.scanapi.dev/api
+purposes. It can be accessed at https://demo.scanapi.dev/
 
 # Run
 
 Requirements:
+
 - [ScanAPI](https://pypi.org/project/scanapi/)
 
 ```shell