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/default.conf

@@ -54,14 +54,16 @@ server {
     }
 
     # Handle API requests (if needed)
-    location /api/ {
-        limit_req zone=api burst=20 nodelay;
-        proxy_pass http://backend:3000;
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        proxy_set_header X-Forwarded-Proto $scheme;
-    }
+    # Note: Backend API is not currently deployed
+    # Uncomment and configure when backend service is available
+    # location /api/ {
+    #     limit_req zone=api burst=20 nodelay;
+    #     proxy_pass http://backend:3000;
+    #     proxy_set_header Host $host;
+    #     proxy_set_header X-Real-IP $remote_addr;
+    #     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    #     proxy_set_header X-Forwarded-Proto $scheme;
+    # }
 
     # Handle health check
     location /health {

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;

docker/staging.conf

@@ -54,14 +54,16 @@ server {
     }
 
     # Handle API requests (if needed)
-    location /api/ {
-        limit_req zone=api burst=20 nodelay;
-        proxy_pass http://backend:3000;
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        proxy_set_header X-Forwarded-Proto $scheme;
-    }
+    # Note: Backend API is not currently deployed
+    # Uncomment and configure when backend service is available
+    # location /api/ {
+    #     limit_req zone=api burst=20 nodelay;
+    #     proxy_pass http://backend:3000;
+    #     proxy_set_header Host $host;
+    #     proxy_set_header X-Real-IP $remote_addr;
+    #     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    #     proxy_set_header X-Forwarded-Proto $scheme;
+    # }
 
     # Handle health check
     location /health {