feat: Add CI/CD and deployment configuration

Add Woodpecker CI pipeline, Dockerfile, nginx config, and docker-compose for automated build and deployment.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

nginx.conf

@@ -0,0 +1,15 @@
+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location /assets {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}