Add initial implementation of ePage application with Docker support

- Create main application logic with HTTP handlers for form submissions
- Implement Pushover API integration for sending messages
- Add unit tests for handlers and Pushover payload structure
- Include Dockerfile and docker-compose configuration for easy deployment
- Add example environment file and update README with setup instructions
- Create HTML templates for user interface

.gitignore

@@ -8,6 +8,7 @@
 *.dll
 *.so
 *.dylib
+epage
 
 # Test binary, built with `go test -c`
 *.test
@@ -24,4 +25,3 @@ go.work.sum
 
 # env file
 .env
-