fill out config.yaml docs

Author: LineIndent

docs/hosting/config_file.md

@@ -1,23 +1,28 @@
 ```python exec
 import reflex as rx
 from reflex_image_zoom import image_zoom
-from pcweb.pages.docs import hosting 
+from pcweb.pages.docs import hosting
 from pcweb.pages import docs
 from pcweb.styles.styles import get_code_style, cell_style
 
 ```
-## Config File
+## What is reflex cloud config?
 
-To create a `config.yml` file for your app run the command below:
+The following command:
 
 ```bash
 reflex cloud config
 ```
 
-This will create a yaml file similar to the one below where you can edit the app configuration:
+generates a `cloud.yml` configuration file used to deploy your Reflex app to the Reflex cloud platform. This file tells Reflex how and where to run your app in the cloud.
+
+
+## What does cloud.yml contain?
+
+Here is an example cloud.yml file generated by the command:
 
 ```yaml
-name: medo
+name: default
 description: ''
 regions:
   sjc: 1
@@ -30,3 +35,87 @@ packages:
 - procps
 ```
 
+### Configuration Options Explained
+
+**name**
+- Identifies your deployment in the Reflex Cloud dashboard
+- Use descriptive names like `myapp-prod` or `myapp-staging`
+
+**description**
+- Optional but helpful for team collaboration
+- Document what this deployment is for
+
+**regions**
+- Available regions: `sjc` (San Jose), `lhr` (London), `fra` (Frankfurt), `syd` (Sydney)
+- Format: `region: instance_count`
+- Use multiple regions for global availability and redundancy
+
+**vmtype**
+- `c1m1`: 1 CPU, 1GB RAM (development/small apps)
+- `c2m2`: 2 CPU, 2GB RAM (production ready)
+- `c4m4`: 4 CPU, 4GB RAM (high traffic apps)
+- `c8m8`: 8 CPU, 8GB RAM (enterprise apps)
+
+**hostname**
+- Leave as `null` for default Reflex Cloud URL
+- Set custom domain if you own one
+- Requires DNS configuration (see Custom Domains section)
+
+**envfile**
+- Path to your environment variables file
+- Default is `.env` in your project root
+- Never commit this file to version control
+
+**project**
+- Optional: organizes deployments within your account
+- Useful for separating client projects or environments
+
+**packages**
+- Additional packages your app needs
+
+### Environment Variables (Optional)
+
+If your app uses environment variables, create a `.env` file in your project root:
+
+```bash
+# Database
+DATABASE_URL=postgresql://user:pass@host:port/dbname
+
+# API Keys
+OPENAI_API_KEY=your_api_key_here
+STRIPE_SECRET_KEY=sk_live_...
+
+# App Configuration
+DEBUG=False
+SECRET_KEY=your_secret_key_here
+
+# Custom Variables
+CUSTOM_API_ENDPOINT=https://api.example.com
+```
+
+**Security Best Practices:**
+- Never commit `.env` to version control
+- Use different `.env` files for staging/production
+- Rotate secrets regularly
+- Use strong, unique values for SECRET_KEY
+
+## How to use the cloud.yml
+
+1. Run reflex cloud config to generate the default `cloud.yml` file.
+2. Open `cloud.yml` and customize the keys to fit your app and deployment preferences.
+3. Ensure your .env file (or specified envfile) contains the necessary environment variables for your app.
+4. Deploy your app using Reflex cloud commands (e.g., reflex deploy).
+
+## Where to find values for keys?
+
+- `regions`: Check Reflex cloud documentation or dashboard for region codes and availability.
+- `vmtype`: Check Reflex cloud VM size options to pick the right balance of CPU/memory.
+- `hostname`: Use your own domain name if you want a custom URL, or leave as null for default URLs.
+- `project`: Your Reflex cloud account projects — find them on the Reflex dashboard.
+- `packages`: Add any extra packages your app requires to run.
+
+## Summary
+
+Reflex Cloud provides a streamlined deployment experience for Python web applications. The `cloud.yml` configuration file gives you control over your deployment while maintaining simplicity. Start with basic configurations and scale up as your application grows.
+
+For production applications, consider implementing proper monitoring, backup strategies, and CI/CD pipelines to ensure reliable deployments.