Update Docker Development readme (#470)

Author: daveearley

docker/development/README.md

@@ -0,0 +1,51 @@
+Here’s a cleaner and more polished version of your Hi.Events local development guide:
+
+---
+
+# Hi.Events local development with Docker
+
+This guide walks you through setting up Hi.Events using Docker, including requirements, setup steps, configuration, and
+environment variables.
+
+## Requirements
+
+1. **Docker** – Required for containerized development. [Install Docker](https://docs.docker.com/get-docker/)
+2. **Git** – Needed to clone the
+   repository. [Install Git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
+
+> **Note:** This guide assumes a macOS or Linux environment. Windows users may need to adjust certain commands.
+
+## Setup instructions
+
+### 1. Clone the repository
+
+Clone the Hi.Events GitHub repository:
+
+```bash
+git clone [email protected]:HiEventsDev/Hi.Events.git
+```
+
+### 2. Start the development environment
+
+Navigate to the Docker development directory and run the startup script:
+
+```bash
+cd Hi.Events/docker/development
+./start-dev.sh
+```
+
+Once running, access the app at:
+
+- **Frontend**: [https://localhost:8443](https://localhost:8443)
+
+## Additional configuration
+
+Hi.Events uses environment variables for configuration. You’ll find `.env` files in:
+
+- `frontend/.env`
+- `backend/.env`
+
+You can modify these to customize your setup.
+
+For a full list of environment variables, see
+the [Environment Variables Documentation](https://hi.events/docs/getting-started/deploying#environment-variables).