Initial commit: Orchard content-addressable storage system

- Go server with Gin framework
- PostgreSQL for metadata storage
- MinIO/S3 for artifact storage with SHA256 content addressing
- REST API for grove/tree/fruit operations
- Web UI for managing artifacts
- Docker Compose setup for local development

.dockerignore

@@ -0,0 +1,34 @@
+# Git
+.git
+.gitignore
+
+# IDE
+.idea/
+.vscode/
+
+# Documentation
+*.md
+*.pdf
+docs/
+
+# Local config
+config.local.yaml
+.env*
+
+# Build artifacts
+/bin/
+/build/
+/dist/
+
+# Test artifacts
+*_test.go
+coverage.out
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Local cache
+.orchard/
+tmp/
+temp/