add banner (#1282)

* add banner
* add link for creating a new template

Author: ElenVlass

README.md

@@ -1,5 +1,8 @@
 # NestJS REST API boilerplate 🇺🇦
 
+[![image](https://github.com/brocoders/nestjs-boilerplate/assets/72293912/197da43e-02f4-4895-8d3e-b7a42a591c26)](https://github.com/new?template_name=nestjs-boilerplate&template_owner=brocoders)
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 ![github action status](https://github.com/brocoders/nestjs-boilerplate/actions/workflows/docker-e2e.yml/badge.svg)
 [![renovate](https://img.shields.io/badge/renovate-enabled-%231A1F6C?logo=renovatebot)](https://app.renovatebot.com/dashboard)
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