feat: add Uptime Kuma integration with periodic ping task and configuration options

docs/ConfigurationMaster.md

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+# DocuNova Configuration 
+
+This section contains detailed documentation about configuring DocuNova for your environment.
+
+## Configuration Overview
+
+DocuNova is designed to be highly configurable through environment variables, typically set in a `.env` file. This allows you to enable only the services and integrations you need for your specific use case.
+
+## Documentation Sections
+
+- [Configuration Guide](ConfigurationGuide.md) - Complete list of all available configuration parameters
+- [Google Drive Setup](GoogleDriveSetup.md) - How to set up Google Drive integration
+- [Dropbox Setup](DropboxSetup.md) - How to set up Dropbox integration
+- [OneDrive Setup](OneDriveSetup.md) - How to set up Microsoft OneDrive/Graph integration
+- [Amazon S3 Setup](AmazonS3Setup.md) - How to set up Amazon S3 integration
+
+## Configuration File Location
+
+The `.env` file should be placed at the root of the project directory. When using Docker Compose, you can reference it with the `env_file` directive in your `docker-compose.yml`.
+
+## Example Configuration
+
+Below is a minimal example configuration to get started:
+
+```dotenv
+# Core settings
+DATABASE_URL=sqlite:///./app/database.db
+REDIS_URL=redis://redis:6379/0
+WORKDIR=/workdir
+GOTENBERG_URL=http://gotenberg:3000
+EXTERNAL_HOSTNAME=docunova.example.com
+
+# Enable only the services you need
+# For detailed parameters, see the Configuration Guide
+```
+
+For a complete example with all possible parameters, see the [Configuration Guide](ConfigurationGuide.md).