[SOMA][BOT-3][INFRA] skeleton: project folder structure and all package manifests

soma/nginx/nginx.conf

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+worker_processes auto;
+error_log /var/log/nginx/error.log warn;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
+                    '$status $body_bytes_sent "$http_referer" '
+                    '"$http_user_agent"';
+    access_log /var/log/nginx/access.log main;
+
+    sendfile on;
+    keepalive_timeout 65;
+    client_max_body_size 50M;                 # PDF uploads up to 50MB
+
+    # Gzip
+    gzip on;
+    gzip_types text/plain application/json application/javascript text/css;
+
+    # Security headers applied to all responses
+    add_header X-Frame-Options "DENY" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Permissions-Policy "camera=(), microphone=(self), geolocation=()" always;
+
+    upstream frontend {
+        server frontend:3000;
+    }
+
+    upstream backend {
+        server backend:8000;
+    }
+
+    # HTTP → HTTPS redirect
+    server {
+        listen 80;
+        server_name _;
+        return 301 https://$host$request_uri;
+    }
+
+    # Main HTTPS server
+    server {
+        listen 443 ssl http2;
+        server_name _;                        # replace with your domain
+
+        ssl_certificate     /etc/letsencrypt/live/YOUR_DOMAIN/fullchain.pem;
+        ssl_certificate_key /etc/letsencrypt/live/YOUR_DOMAIN/privkey.pem;
+        ssl_protocols       TLSv1.2 TLSv1.3;
+        ssl_ciphers         ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
+        ssl_prefer_server_ciphers off;
+        ssl_session_timeout 1d;
+        ssl_session_cache shared:SSL:10m;
+
+        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'self' ws: wss:; font-src 'self';" always;
+
+        # Health check — no auth, no log
+        location = /health {
+            proxy_pass http://backend;
+            proxy_set_header Host $host;
+            access_log off;
+        }
+
+        # Backend API — all /api/v1/* routes
+        location /api/v1/ {
+            proxy_pass http://backend;
+            proxy_http_version 1.1;
+            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;
+
+            # SSE streaming — disable buffering
+            proxy_set_header Connection '';
+            proxy_buffering off;
+            proxy_cache off;
+            proxy_read_timeout 300s;          # long timeout for SSE streams
+        }
+
+        # Frontend — everything else
+        location / {
+            proxy_pass http://frontend;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection 'upgrade';
+            proxy_set_header Host $host;
+            proxy_cache_bypass $http_upgrade;
+        }
+
+        # Static assets cache
+        location /_next/static/ {
+            proxy_pass http://frontend;
+            add_header Cache-Control "public, max-age=31536000, immutable";
+        }
+    }
+}