Merge branch 'soon' into staging

Dockerfile

@@ -14,6 +14,8 @@ VOLUME /cryptpad/blobstage
 VOLUME /cryptpad/pins
 VOLUME /cryptpad/tasks
 VOLUME /cryptpad/block
+VOLUME /cryptpad/blob
+VOLUME /cryptpad/blobstage
 
 # Required packages
 #   jq is a build only dependency, removed in cleanup stage

customize.dist/src/less2/include/corner.less

@@ -36,7 +36,7 @@
         text-align: right;
         background-color: @colortheme_logo-1;
         color: @colortheme_base;
-        z-index: 999;
+        z-index: 9999;
         transform-origin: bottom right;
         animation: appear 0.8s ease-in-out;
         box-shadow: 0 0 10px 0 @colortheme_logo-1;