```

chore: enhance .gitignore and remove obsolete documentation files

- Reorganize .gitignore with categorized sections for better maintainability
- Add comprehensive ignore patterns for Python, Node.js, databases, logs, and build artifacts
- Add project-specific ignore rules for coordinator, explorer, and deployment files
- Remove outdated documentation: BITCOIN-WALLET-SETUP.md, LOCAL_ASSETS_SUMMARY.md, README-CONTAINER-DEPLOYMENT.md, README-DOMAIN-DEPLOYMENT.md
```

infra/nginx/nginx-aitbc.conf

@@ -0,0 +1,133 @@
+# AITBC Services Nginx Configuration
+# Domain: https://aitbc.bubuit.net
+
+server {
+    listen 80;
+    server_name aitbc.bubuit.net;
+    
+    # Redirect to HTTPS
+    return 301 https://$server_name$request_uri;
+}
+
+server {
+    listen 443 ssl http2;
+    server_name aitbc.bubuit.net;
+    
+    # SSL Configuration (Let's Encrypt)
+    ssl_certificate /etc/letsencrypt/live/aitbc.bubuit.net/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/aitbc.bubuit.net/privkey.pem;
+    include /etc/letsencrypt/options-ssl-nginx.conf;
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
+    
+    # Security Headers
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header Referrer-Policy "no-referrer-when-downgrade" always;
+    add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;
+    
+    # API Routes
+    location /api/ {
+        proxy_pass http://127.0.0.1:8000/v1/;
+        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;
+        proxy_buffering off;
+    }
+    
+    # Blockchain RPC Routes
+    location /rpc/ {
+        proxy_pass http://127.0.0.1:9080/rpc/;
+        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;
+        proxy_buffering off;
+    }
+    
+    # Marketplace UI
+    location /Marketplace {
+        proxy_pass http://127.0.0.1:3001/;
+        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 $scheme;
+        
+        # Handle subdirectory
+        rewrite ^/Marketplace/(.*)$ /$1 break;
+        proxy_buffering off;
+    }
+    
+    # Trade Exchange
+    location /Exchange {
+        proxy_pass http://127.0.0.1:3002/;
+        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 $scheme;
+        
+        # Handle subdirectory
+        rewrite ^/Exchange/(.*)$ /$1 break;
+        proxy_buffering off;
+    }
+    
+    # Exchange API Routes
+    location /api/trades/ {
+        proxy_pass http://127.0.0.1:3003/api/trades/;
+        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;
+        proxy_buffering off;
+    }
+    
+    location /api/orders {
+        proxy_pass http://127.0.0.1:3003/api/orders;
+        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;
+        proxy_buffering off;
+    }
+    
+    # Wallet CLI API (if needed)
+    location /wallet/ {
+        proxy_pass http://127.0.0.1:8000/wallet/;
+        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;
+    }
+    
+    # Admin routes
+    location /admin/ {
+        proxy_pass http://127.0.0.1:8000/admin/;
+        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;
+        
+        # Restrict access (optional)
+        # allow 127.0.0.1;
+        # allow 10.1.223.0/24;
+        # deny all;
+    }
+    
+    # Health check
+    location /health {
+        proxy_pass http://127.0.0.1:8000/v1/health;
+        proxy_set_header Host $host;
+    }
+    
+    # Default redirect to Marketplace
+    location / {
+        return 301 /Marketplace;
+    }
+    
+    # Static file caching
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}

infra/nginx/nginx-assets.conf

@@ -0,0 +1,18 @@
+# Add to /etc/nginx/sites-available/aitbc.conf
+
+# Serve production assets
+location /assets/ {
+    alias /var/www/html/assets/;
+    expires 1y;
+    add_header Cache-Control "public, immutable";
+    add_header X-Content-Type-Options nosniff;
+    
+    # Gzip compression
+    gzip on;
+    gzip_types text/css application/javascript image/svg+xml;
+}
+
+# Security headers
+add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+add_header X-Frame-Options "SAMEORIGIN" always;
+add_header X-Content-Type-Options "nosniff" always;

infra/nginx/nginx-local.conf

@@ -0,0 +1,63 @@
+# Local nginx configuration for AITBC domain testing
+# Save as /etc/nginx/sites-available/aitbc-local
+
+server {
+    listen 80;
+    server_name aitbc.bubuit.net localhost;
+    
+    # API routes
+    location /api/ {
+        proxy_pass http://127.0.0.1:8000/v1/;
+        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;
+    }
+    
+    # Admin routes
+    location /admin/ {
+        proxy_pass http://127.0.0.1:8000/admin/;
+        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;
+    }
+    
+    # Blockchain RPC
+    location /rpc/ {
+        proxy_pass http://127.0.0.1:9080/rpc/;
+        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;
+    }
+    
+    # Marketplace UI
+    location /Marketplace {
+        proxy_pass http://127.0.0.1:3001/;
+        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;
+    }
+    
+    # Trade Exchange
+    location /Exchange {
+        proxy_pass http://127.0.0.1:3002/;
+        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;
+    }
+    
+    # Health endpoint
+    location /health {
+        proxy_pass http://127.0.0.1:8000/v1/health;
+        proxy_set_header Host $host;
+    }
+    
+    # Default redirect
+    location / {
+        return 301 /Marketplace;
+    }
+}

infra/nginx/nginx_admin_endpoints.conf

@@ -0,0 +1,15 @@
+location = /api/treasury-balance {
+        proxy_pass http://127.0.0.1:8085;
+        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;
+    }
+
+    location = /api/exchange/wallet/info {
+        proxy_pass http://127.0.0.1:8085;
+        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;
+    }

infra/nginx/nginx_fonts.conf

@@ -0,0 +1,5 @@
+location /fonts-font-awesome/ {
+        alias /usr/share/fonts-font-awesome/;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }