feat: Initialize NxMesh project with Docker, Nginx, PostgreSQL, and Rust backend

- Add Docker Compose configuration for development environment
- Create Nginx configuration files for routing and health checks
- Set up PostgreSQL database with health checks
- Add .dockerignore and .gitignore files to exclude unnecessary files
- Initialize Cargo.toml and Cargo.lock for Rust dependencies
- Include GNU General Public License for project
- Add README.md for project description
- Create Justfile for development workflow commands

.devcontainer/nginx/conf.d/default.conf

@@ -0,0 +1,20 @@
+# Default nginx configuration
+# The agent can dynamically modify this to route traffic as needed
+
+server {
+    listen 80;
+    server_name localhost;
+
+    # Default health check
+    location /health {
+        access_log off;
+        return 200 "nginx ok\n";
+        add_header Content-Type text/plain;
+    }
+
+    # Default stub - agent configures actual routing
+    location / {
+        return 200 "NxMesh Data Plane\n";
+        add_header Content-Type text/plain;
+    }
+}

.devcontainer/nginx/nginx.conf

@@ -0,0 +1,38 @@
+user nginx;
+worker_processes auto;
+error_log /var/log/nginx/error.log warn;
+pid /var/run/nginx.pid;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
+    # Docker internal DNS resolver for dynamic upstreams
+    resolver 127.0.0.11 valid=30s;
+
+    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
+                    '$status $body_bytes_sent "$http_referer" '
+                    '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log /var/log/nginx/access.log main;
+
+    sendfile on;
+    tcp_nopush on;
+    tcp_nodelay on;
+    keepalive_timeout 65;
+    types_hash_max_size 2048;
+    client_max_body_size 100M;
+
+    # Gzip compression
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 1024;
+    gzip_types text/plain text/css text/xml text/javascript application/json application/javascript application/xml+rss application/rss+xml font/truetype font/opentype application/vnd.ms-fontobject image/svg+xml;
+
+    # Include server configurations
+    include /etc/nginx/conf.d/*.conf;
+}