Add expire time in response header for better browser leverage caching (#483)

* .htaccess file added
* update expire time to a shorter time
diff --git a/.htaccess b/.htaccess
new file mode 100644
index 0000000..dd104c6
--- /dev/null
+++ b/.htaccess
@@ -0,0 +1,19 @@
+<IfModule mod_expires.c>

+  ExpiresActive On

+

+  # Images

+  ExpiresByType image/jpeg "access plus 7 days"

+  ExpiresByType image/gif "access plus 7 days"

+  ExpiresByType image/png "access plus 7 days"

+  ExpiresByType image/webp "access plus 7 days"

+  ExpiresByType image/svg+xml "access plus 7 days"

+  ExpiresByType image/x-icon "access plus 7 days"

+

+ 

+  # CSS, JavaScript

+  ExpiresByType text/css "access plus 1 days"

+  ExpiresByType text/javascript "access plus 1 days"

+  ExpiresByType application/javascript "access plus 1 days"

+

+ 

+</IfModule>