fix: add nginx config for Jekyll clean URLs

Configure nginx to try .html extension for clean URLs like /music/shadow

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -27,6 +27,9 @@ RUN bundle exec jekyll build
 # Production stage
 FROM nginx:alpine
 
+# Copy custom nginx configuration
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
 # Copy built site from builder
 COPY --from=builder /app/_site /usr/share/nginx/html
 

nginx.conf

@@ -0,0 +1,23 @@
+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html index.htm;
+
+    # Jekyll clean URLs - try .html extension
+    location / {
+        try_files $uri $uri.html $uri/ =404;
+    }
+
+    # Handle 404 errors
+    error_page 404 /404.html;
+    location = /404.html {
+        internal;
+    }
+
+    # Handle server errors
+    error_page 500 502 503 504 /50x.html;
+    location = /50x.html {
+        internal;
+    }
+}