Add baseline start point (#1)

Co-authored-by: Michael DiLeo <michael.dileo@oakstreethealth.com>
Reviewed-on: #1

nginx.conf

@@ -0,0 +1,66 @@
+user nginx;
+worker_processes auto;
+pid /var/run/nginx.pid;
+
+events {
+    worker_connections 1024;
+    use epoll;
+    multi_accept on;
+}
+
+http {
+    sendfile on;
+    tcp_nopush on;
+    tcp_nodelay on;
+    keepalive_timeout 65;
+    server_tokens off;
+    
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+    
+    access_log /dev/stdout;
+    error_log /dev/stderr;
+    
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 1024;
+    gzip_types text/plain text/css text/xml text/javascript 
+               application/javascript application/xml+rss 
+               application/json image/svg+xml;
+    
+    server {
+        listen 80;
+        server_name _;
+        
+        root /usr/share/nginx/html;
+        index index.html;
+        
+        # Security headers
+        add_header X-Frame-Options "SAMEORIGIN" always;
+        add_header X-Content-Type-Options "nosniff" always;
+        add_header X-XSS-Protection "1; mode=block" always;
+        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+        
+        location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+            expires 1w;
+            add_header Cache-Control "public, immutable";
+        }
+        
+        location ~* \.html$ {
+            expires 1h;
+            add_header Cache-Control "public";
+        }
+        
+        location /health {
+            access_log off;
+            return 200 'healthy\n';
+            add_header Content-Type text/plain;
+        }
+        
+        location / {
+            try_files $uri $uri/ /index.html;
+        }
+        
+        error_page 404 /index.html;
+    }
+}