directory cleanup on startup

yarn.lock

@@ -5291,6 +5291,14 @@ find-free-port@^2.0.0:
   resolved "https://registry.yarnpkg.com/find-free-port/-/find-free-port-2.0.0.tgz#4b22e5f6579eb1a38c41ac6bcb3efed1b6da9b1b"
   integrity sha1-SyLl9leesaOMQaxryz7+0bbamxs=
 
+find-remove@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/find-remove/-/find-remove-2.0.3.tgz#46e1cb12ca247963bc594c3af4c4878ba2244a79"
+  integrity sha512-T7v/mSYhz2mv3ZM37BJH6Ny9tudA1qjJtH9N8MAZQKskJ546ciyMjPxsT7N/9OcbpN9+vfxMNHefzLbXOdMrhQ==
+  dependencies:
+    fmerge "1.2.0"
+    rimraf "3.0.2"
+
 find-root@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/find-root/-/find-root-1.1.0.tgz#abcfc8ba76f708c42a97b3d685b7e9450bfb9ce4"
@@ -5379,6 +5387,11 @@ flux@^3.1.3:
     fbemitter "^2.0.0"
     fbjs "^0.8.0"
 
+fmerge@1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/fmerge/-/fmerge-1.2.0.tgz#36e99d2ae255e3ee1af666b4df780553671cf692"
+  integrity sha1-NumdKuJV4+4a9ma033gFU2cc9pI=
+
 follow-redirects@1.5.10:
   version "1.5.10"
   resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.10.tgz#7b7a9f9aea2fdff36786a94ff643ed07f4ff5e2a"
@@ -10684,7 +10697,7 @@ rimraf@2.6.3:
   dependencies:
     glob "^7.1.3"
 
-rimraf@^3.0.0:
+rimraf@3.0.2, rimraf@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-3.0.2.tgz#f1a5402ba6220ad52cc1282bac1ae3aa49fd061a"
   integrity sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==