Fix Docker build issues and SQL worker configuration

- Fix .dockerignore to allow dist directory for Docker builds
- Add uint8arrays dependency for crypto operations
- Configure Vite for proper SQL worker bundling with absurd-sql
- Update Dockerfile with build context documentation
- Fix Nginx configuration for non-root user permissions
- Remove conflicting backend proxy configuration
- Add SQL worker polyfills to vite.config.common.mts

Resolves Docker build failures and ensures proper SQL database functionality
in containerized environment.

docker/nginx.conf

@@ -9,10 +9,10 @@
 # - Static file caching optimization
 # - Security hardening
 
-user nginx;
+# user nginx;  # Commented out - nginx runs as non-root user in container
 worker_processes auto;
 error_log /var/log/nginx/error.log warn;
-pid /var/run/nginx.pid;
+pid /tmp/nginx.pid;  # Use /tmp for PID file to avoid permission issues
 
 events {
     worker_connections 1024;