allow any type of attachments; fixed cordova build in docker

nodejs/public/stylesheets/safechat.css

@@ -247,9 +247,12 @@ label[for=send] img {
   float: left;
   padding: .5ex 1ex .5ex 1ex;
 }
-#msgs .msg img {
+#msgs .msg .text img {
+  border-radius: 2ex;
+  -moz-border-radius: 2ex;
+  -webkit-border-radius: 2ex;
   display: block;
-  width: 99%;
+  width: 100%;
 }
 
 #preview img {