improve features page with subheadings

Author: commit111

docs/intro/features.mdx

@@ -6,17 +6,26 @@ description: Defang Features
 
 # Defang Features
 
-Defang provides a streamlined experience to develop, deploy, observe, and update your cloud applications. Defang includes the following features:
+Defang provides a streamlined experience to develop, deploy, and debug your cloud applications. Defang includes the following features:
 
-- Support for [various types of applications](/docs/intro/use-cases): Web services and APIs, mobile app backends, ML services, hosting LLMs, etc.
-- Support for your programming [language of choice](/docs/samples): Node.js, Python, Golang, or anything else you can package in a Dockerfile.
+### Wide Variety of Use Cases
+- Support for [various types of applications](/docs/intro/use-cases): web services and APIs, mobile app backends, ML services, hosting LLMs, etc...
+- Support for your programming [language of choice](/docs/samples): Node.js, Python, Golang, or anything else you can package in a Dockerfile
+
+### AI-Driven Features
 - Built-in AI agent to go [from natural language prompt to an outline project](/docs/tutorials/generate-new-code-using-ai)
 - Built-in AI agent to help you [debug your cloud applications](/docs/concepts/debug)
+
+### Container Friendly
 - Automated [Dockerfile builds](/docs/concepts/deployments)
 - Support for [pre-built Docker containers](/docs/tutorials/deploy-container-using-the-cli), from public or private image registries
 - Ability to express your project configuration using a [Docker Compose YAML](/docs/concepts/compose) file
-- Ability to manage [encrypted configuration values](/docs/concepts/configuration)
-- Pre-configured environments with built-in [security](/docs/concepts/security), [networking](/docs/concepts/networking), and [observability](/docs/concepts/observability)
+
+### Effortless Deployment
 - [One-command deployments](/docs/getting-started#install-the-defang-cli)
-- Support for [GPUs](/docs/concepts/resources)
+- Support for [GPUs](/docs/concepts/resources) and [managed storage options](/docs/concepts/managed-storage)
 - Support for Infra-as-Code via the [Defang Pulumi provider](/docs/concepts/pulumi)
+
+### Security and Configuration
+- Ability to manage [encrypted configuration values](/docs/concepts/configuration)
+- Pre-configured environments with built-in [security](/docs/concepts/security), [networking](/docs/concepts/networking), and [observability](/docs/concepts/observability)