diff --git a/index.php b/index.php
index 833e7db..5d17c92 100644
--- a/index.php
+++ b/index.php
@@ -41,7 +41,7 @@
 </div>
 </div>
 
-<button class="btn btn-primary btn-lg" id="b" onclick="submitPressed()">Fetch tweets</button>
+<button class="btn btn-primary btn-lg" id="b" type="submit">Fetch tweets</button>
 </div>
 
 </form>
diff --git a/nginx.conf b/nginx.conf
index 8b3087e..ca11f36 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -16,8 +16,8 @@ http {
 		server_name greptweet.com;
 		root /srv/http;
 		charset utf-8;
-		access_log /var/log/nginx/greptweet.access.log;
-		error_log /var/log/nginx/greptweet.error.log;
+		access_log /srv/http/u/greptweet.access.log;
+		error_log /srv/http/u/greptweet.error.log;
 
 		location / {
 			index index.php index.html;
@@ -33,6 +33,10 @@ http {
 			expires 7d;
 		}
 
+		location ~* \.(appcache)$ {
+			expires 30s;
+		}
+
 		location ~ \.php$ {
 			try_files      $uri = 404;
 			fastcgi_pass   unix:/run/php-fpm/php-fpm.sock;