Add KBFS as recommended cloud storage provider (#1876)

_includes/sections/cloud-storage.html

@@ -4,6 +4,25 @@
   <strong>If you are currently using Dropbox, Google Drive, Microsoft OneDrive or Apple iCloud, you should pick an alternative here.</strong>
 </div>
 
+{%
+  include cardv2.html
+  title="Keybase KBFS"
+  image="/assets/img/svg/3rd-party/keybase.svg"
+  description='Keybase provides 250GB of E2EE cloud storage for free. Its protocol has also been <a href="https://keybase.io/docs-assets/blog/NCC_Group_Keybase_KB2018_Public_Report_2019-02-27_v1.3.pdf">indepedently audited (PDF)</a>. Keybase allows you to share files with any Keybase user, or social media user through the use of "<a href="https://en.wikipedia.org/wiki/Keybase#Identity_proofs">identity proofs</a>". They currently do not offer additional space above your quota.'
+  labels="warning:<a href=//github.com/keybase/client/issues/6374>Warning</a>:This software relies on a closed-source central server."
+  website="https://book.keybase.io/docs/files"
+  privacy-policy="https://keybase.io/docs/privacypolicy"
+  forum="https://forum.privacytools.io/t/discussion-keybase/1224"
+  tor="http://keybase5wmilwokqirssclfnsqrjdsi7jdir5wy7y7iu3tanwmtp6oid.onion/"
+  github="https://github.com/keybase/client/tree/master/go/kbfs"
+  windows="https://keybase.io/docs/the_app/install_windows"
+  mac="https://keybase.io/docs/the_app/install_macos"
+  linux="https://keybase.io/docs/the_app/install_linux"
+  freebsd="https://www.freshports.org/security/keybase/"
+  googleplay="https://play.google.com/store/apps/details?id=io.keybase.ossifrage"
+  ios="https://apps.apple.com/app/keybase-crypto-for-everyone/id1044461770"
+%}
+
 {% include cardv2.html
   title="Nextcloud - Choose your hoster"
   image="/assets/img/svg/3rd-party/nextcloud.svg"