Update README.md

Author: ajhai

README.md

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     <em>LLMStack is a no-code platform for building generative AI applications, chatbots, agents and connecting them to your data and business processes.</em>
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+    <a href="https://llmstack.ai/docs/getting-started/introduction#quickstart" target="_blank">Quickstart</a> | <a href="https://llmstack.ai/docs/" target="_blank">Documentation</a> | <a href="trypromptly.com" target="_blank">Promptly</a>
+</p>
 
 ## Overview
 
 Build tailor-made generative AI applications, chatbots and agents that cater to your unique needs by chaining multiple LLMs. Seamlessly integrate your own data and GPT-powered models without any coding experience using LLMStack's no-code builder. Trigger your AI chains from Slack or Discord. Deploy to the cloud or on-premise.
 
+https://github.com/trypromptly/LLMStack/assets/431988/1cb48899-0061-4f9a-ac26-aa711fdda7cb
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 ## Getting Started
 
 **_Check out our Cloud offering at [Promptly](https://trypromptly.com) or follow the instructions below to deploy LLMStack on your own infrastructure._**