nginx: enable cache for static files

nginx.conf

@@ -1,8 +1,22 @@
 server {
-  listen 3000;
-  location / {
+    listen 3000;
     root /usr/share/nginx/html;
-    index index.html index.htm;
-    try_files $uri $uri/ /index.html =404;
-  }
-} 
+
+    location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|mp3|ogg|ogv|webm|htc|woff2|woff)$ {
+        expires 1M;
+        access_log off;
+        # max-age must be in seconds
+        add_header Cache-Control "max-age=2629746, public";
+    }
+
+    location ~* \.(?:css|js)$ {
+        expires 1M;
+        access_log off;
+        add_header Cache-Control "max-age=2629746, public";
+    }
+
+    location / {
+        index index.html index.htm;
+        try_files $uri $uri/ /index.html =404;
+    }
+}