docs: contributing instructions added (#592)

Co-authored-by: Alejandra Quetzalli <[email protected]>

contribute-blog-post.md

@@ -0,0 +1,27 @@
+## Contribute AsyncAPI blog posts
+
+The AsyncAPI blog is open to everyone; any contribution is allowed, including reposting. You can share use cases, projects, or tools in the form of a blog post to reach out to the entire AsyncAPI community.
+
+Posting on the AsyncAPI blog has many advantages. We'll ask on the community Slack to help promote it whenever it is released.
+We'll also share it on the official AsyncAPI Twitter, LinkedIn, Hacker News, and Reddit accounts. 
+
+Steps to submit an AsyncAPI blog post:
+1. Open an [AsyncAPI blog post issue](https://github.com/asyncapi/website/issues/new?template=blog.md). 
+1. Open a PR with your blog post.
+1. Address all PR feedback until it gains approval from maintainers.
+
+# Blog post requirements
+Please observe the following requirements for all AsyncAPI blog post contributions:
+- [Fork the AsyncAPI `website` repo](https://github.com/asyncapi/website)
+- [Add a new markdown file](https://github.com/asyncapi/website/tree/master/pages/blog) with proper metadata (front matter) and the blog post content. The blog post content is up to you; it just needs to feature "AsyncAPI."
+- [Place all images in our blog assets folder](https://github.com/asyncapi/website/tree/master/public/img/posts). 
+   - Compress the image as much as possible; we recommend using the following tool: https://squoosh.app.
+   - The output format needs to be `.webp`.
+   - Include detailed `alt` descriptions for screenreader users.
+
+- [Run our website locally or with Gitpod](https://github.com/asyncapi/website#usage) to test changes.
+- Open a PR with your blog post and review your changes with the Netlify preview link.
+- Address all PR feedback left by Maintainers reviewing your blog post.
+- When merged, your blog post will immediately become live in production!
+
+We encourage you to write a blog post and share it with the community. We can't wait to read it!