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.

vite.config.web.mts

@@ -80,6 +80,20 @@ export default defineConfig(async ({ mode }) => {
     sourcemap: mode === 'development' || mode === 'test',
     // Server configuration inherited from base config
     // CORS headers removed to allow images from any domain
-    plugins: []
+    plugins: [],
+    // Worker configuration for SQL worker
+    worker: {
+      format: 'es',
+      plugins: () => []
+    },
+    // Optimize dependencies for SQL worker
+    optimizeDeps: {
+      include: [
+        '@jlongster/sql.js',
+        'absurd-sql',
+        'absurd-sql/dist/indexeddb-main-thread',
+        'absurd-sql/dist/indexeddb-backend'
+      ]
+    }
   });
 });