Update README.md

README.md

@@ -63,14 +63,28 @@ This project provides a self-contained, Dockerized email reminder system that po
 - SMTP credentials for an outbound mail service
     
 
-## Environment Variables
+## Environment Configuration
 
-Place these in a `.env` file in the root of your project:
+All configuration is done via environment variables. An example file is provided:
 
-```env
-...
+```bash
+.env.example
 ```
 
+To get started:
+
+1. Copy the file:
+```bash
+cp .env.example .env
+```
+    
+2. Edit `.env` and fill in your CalDAV, SMTP, and scheduling details
+    
+3. Run the container using that `.env` file
+    
+
+The app supports custom sync and dispatch intervals, authentication for CalDAV and SMTP, and full control over how reminders are sent. See `.env.example` for all available options and default values.
+
 ## Building the Docker Image
 
 ```bash