feat: Integrate Docusaurus for documentation and enhance project structure

- Added Docusaurus configuration and initial setup for documentation.
- Created multiple documentation pages covering installation, configuration, and core concepts.
- Implemented a GitHub Actions workflow for automatic deployment of documentation to GitHub Pages.
- Updated .gitignore to exclude Docusaurus build artifacts and dependencies.
- Enhanced README with a link to the online documentation.

docs/docs/core-concepts/connections.md

@@ -0,0 +1,128 @@
+---
+sidebar_position: 2
+title: Connections
+---
+
+# Connection Management
+
+Connections in GoMFT are configurations that define how to access different storage systems. Before you can transfer files, you need to set up connections for your source and destination systems.
+
+## Supported Connection Types
+
+GoMFT leverages rclone as its transfer engine, supporting a wide range of storage systems:
+
+### Cloud Storage
+
+- **Amazon S3**: Amazon's object storage service
+- **Google Cloud Storage**: Google's object storage service
+- **Backblaze B2**: Affordable cloud object storage
+- **Wasabi**: Hot cloud storage
+
+### File Transfer Protocols
+
+- **FTP**: File Transfer Protocol
+- **SFTP**: SSH File Transfer Protocol
+- **WebDAV**: Web Distributed Authoring and Versioning
+
+### Local Storage
+
+- **Local Disk**: Files on the server running GoMFT
+- **SMB/CIFS**: Windows file sharing
+
+## Creating a Connection
+
+To create a new connection:
+
+1. Navigate to the **Transfer Configuration** section in the sidebar
+2. Click **+ New Configuration**
+3. Select the connection type from the dropdown menu
+4. Fill in the required details for your selected type
+5. Click **Test Source/Destination** to verify the connection works
+6. Click **Create Configuration** to store the configuration
+
+## Connection Configuration Fields
+
+Different connection types require different configuration fields. Here are some common examples:
+
+### Amazon S3 Connection
+
+- **Name**: A descriptive name for the connection
+- **Access Key ID**: AWS access key
+- **Secret Access Key**: AWS secret key
+- **Region**: AWS region (e.g., us-east-1)
+- **Endpoint**: Optional custom endpoint for S3-compatible services
+- **Bucket**: Default bucket to use (optional)
+- **Path Prefix**: Default path prefix within the bucket (optional)
+
+### SFTP Connection
+
+- **Name**: A descriptive name for the connection
+- **Host**: Server hostname or IP address
+- **Port**: Server port (usually 22)
+- **Username**: SFTP username
+- **Authentication Method**: Password or SSH Key
+- **Password**: User password (if using password authentication)
+- **SSH Key**: Private SSH key (if using key authentication)
+- **SSH Key Passphrase**: Passphrase for SSH key (if applicable)
+
+### Local Storage Connection
+
+- **Name**: A descriptive name for the connection
+- **Path**: Base path on the local filesystem
+
+## Connection Security
+
+GoMFT follows best practices for handling connection credentials:
+
+- **Encryption**: All sensitive credentials are encrypted at rest
+- **Access Control**: Connections are protected by user permissions
+- **Masked Values**: Passwords and secret keys are masked in the UI
+- **Key Management**: SSH keys and other credentials are securely stored
+
+## Managing Connections
+
+### Viewing Connections
+
+The **Transfer Configurations** page displays all configured connections with:
+- Configuration name
+- Configuration type
+- Last updated date
+
+### Editing Transfer Confirgurations
+
+To edit an existing connection:
+1. Navigate to the **Transfer Confiruations** section
+2. Find the config you want to edit
+3. Click the **Edit** button
+4. Modify the config details
+5. Test the updated configuration
+6. Save your changes
+
+### Deleting Transfer Configurations
+
+To delete a connection:
+1. Navigate to the **Transfer Configurations** section
+2. Find the config you want to delete
+3. Click the **Delete** button
+4. Confirm the deletion
+
+**Note**: You cannot delete connections that are in use by active transfers or schedules.
+
+## Testing Transfer Configurations
+
+GoMFT includes a configuration testing feature to verify connectivity:
+
+1. After entering details for a configuration, click **Test Source/Destination**
+2. GoMFT will attempt to authenticate with the remote system
+3. For file storage, it will also verify read/write permissions
+4. Results will display showing success or failure details
+
+## Best Practices
+
+- **Use descriptive names** for connections to easily identify them
+- **Test connections regularly** to ensure they still work
+- **Rotate credentials** periodically for enhanced security
+- **Use service accounts** rather than personal accounts when possible
+- **Document connection details** in the description field
+- **Use the minimal required permissions** for enhanced security
+- **Organize connections** using consistent naming conventions