docs: docs website + installation (#778)

* feat: WIP doc (vibe started and iterated)

* install from scratch docs

* caddyfile.example

* gitignore

* authentik script

* authentik script

* authentik script

* llm doc

* authentik ongoing

* more daily setup logs

* doc website

* gpu self hosted setup guide (no-mistakes)

* doc review round

* doc review round

* doc review round

* update doc site sidebars

* feat(docs): add mermaid diagram support

* docs polishing

* live pipeline doc

* move pipeline dev docs to dev docs location

* doc pr review iteration

* dockerfile healthcheck

* docs/pr-comments

* remove jwt comment

* llm suggestion

* pr comments

* pr comments

* document auto migrations

* cleanup docs

---------

Co-authored-by: Mathieu Virbel <mat@meltingrocks.com>
Co-authored-by: Igor Loskutov <igor.loskutoff@gmail.com>

docs/docs/concepts/pipeline.md

@@ -0,0 +1,183 @@
+---
+sidebar_position: 4
+title: Processing Pipeline
+---
+
+# Processing Pipeline
+
+Reflector uses a modular pipeline architecture to process audio efficiently and accurately.
+
+## Pipeline Overview
+
+The processing pipeline consists of modular components that can be combined and configured based on your needs:
+
+```mermaid
+graph LR
+    A[Audio Input] --> B[Pre-processing]
+    B --> C[Chunking]
+    C --> D[Transcription]
+    D --> E[Diarization]
+    E --> F[Alignment]
+    F --> G[Post-processing]
+    G --> H[Output]
+```
+
+## Pipeline Components
+
+### Audio Input
+
+Accepts various input sources:
+- **File Upload**: MP3, WAV, M4A, WebM, MP4
+- **WebRTC Stream**: Live browser audio
+- **Recording Integration**: Daily.co and Whereby recordings
+- **API Upload**: Direct API submission
+
+### Pre-processing
+
+Prepares audio for optimal processing:
+- **Format Conversion**: Convert to 16kHz mono WAV
+- **Noise Reduction**: Optional background noise removal
+- **Validation**: Check duration and quality
+
+### Chunking
+
+Splits audio for parallel processing:
+- **Configurable Size**: Audio split into processable segments
+- **Silence Detection**: Optional splitting at natural pauses
+- **Metadata**: Track chunk positions
+
+### Transcription
+
+Converts speech to text:
+- **Model Selection**: Whisper or Parakeet
+- **Language Detection**: Automatic or specified
+- **Timestamp Generation**: Word-level timing
+- **Confidence Scores**: Quality indicators
+
+### Diarization
+
+Identifies different speakers:
+- **Voice Activity Detection**: Find speech segments
+- **Speaker Embedding**: Extract voice characteristics
+- **Clustering**: Group similar voices
+- **Label Assignment**: Assign speaker IDs
+
+### Alignment
+
+Merges all processing results:
+- **Chunk Assembly**: Combine transcription chunks
+- **Speaker Mapping**: Align speakers with text
+- **Overlap Resolution**: Handle chunk boundaries
+- **Timeline Creation**: Build unified timeline
+
+### Post-processing
+
+Enhances the final output:
+- **Formatting**: Apply punctuation and capitalization
+- **Summarization**: Generate concise summaries
+- **Topic Extraction**: Identify key themes
+- **Action Items**: Extract tasks and decisions
+
+## Processing Modes
+
+### Batch Processing
+
+For uploaded files:
+- Optimized for throughput
+- Parallel chunk processing
+- Higher accuracy models
+- Complete file analysis
+
+### Stream Processing
+
+For live audio:
+- Optimized for latency
+- Sequential processing
+- Real-time feedback
+- Progressive results
+
+### Hybrid Processing
+
+For meetings:
+- Stream during meeting
+- Batch after completion
+- Best of both modes
+- Maximum accuracy
+
+## Pipeline Orchestration
+
+### Error Handling
+
+Error recovery:
+- **Automatic Retry**: Failed tasks retry up to 3 times
+- **Partial Recovery**: Continue with successful chunks
+- **Fallback Models**: Use alternative models on failure
+- **Error Reporting**: Detailed error messages
+
+### Progress Tracking
+
+Real-time progress updates:
+- **Chunk Progress**: Track individual chunk processing
+- **Overall Progress**: Percentage completion
+- **ETA Calculation**: Estimated completion time
+- **WebSocket Updates**: Live progress to clients
+
+## Optimization Strategies
+
+### GPU Utilization
+
+Maximize GPU efficiency:
+- **Batch Processing**: Process multiple chunks together
+- **Model Caching**: Keep models loaded in memory
+- **Dynamic Batching**: Adjust batch size based on GPU memory
+- **Multi-GPU Support**: Distribute across available GPUs
+
+### Memory Management
+
+Efficient memory usage:
+- **Streaming Processing**: Process large files in chunks
+- **Garbage Collection**: Clean up after each chunk
+- **Memory Limits**: Prevent out-of-memory errors
+- **Disk Caching**: Use disk for large intermediate results
+
+### Network Optimization
+
+Minimize network overhead:
+- **Compression**: Compress audio before transfer
+- **CDN Integration**: Use CDN for static assets
+- **Connection Pooling**: Reuse network connections
+- **Parallel Uploads**: Multiple concurrent uploads
+
+## Quality Assurance
+
+### Accuracy Metrics
+
+Monitor processing quality:
+- **Word Error Rate (WER)**: Transcription accuracy
+- **Diarization Error Rate (DER)**: Speaker identification accuracy
+- **Summary Coherence**: Summary quality metrics
+
+### Validation Steps
+
+Ensure output quality:
+- **Confidence Thresholds**: Filter low-confidence segments
+- **Consistency Checks**: Verify timeline consistency
+- **Language Validation**: Ensure correct language detection
+- **Format Validation**: Check output format compliance
+
+## Advanced Features
+
+### Custom Models
+
+Use your own models:
+- **Fine-tuned Whisper**: Domain-specific models
+- **Custom Diarization**: Trained on your speakers
+- **Specialized Post-processing**: Industry-specific formatting
+
+### Pipeline Extensions
+
+Add custom processing steps:
+- **Sentiment Analysis**: Analyze emotional tone
+- **Entity Extraction**: Identify people, places, organizations
+- **Custom Metrics**: Calculate domain-specific metrics
+- **Integration Hooks**: Call external services