added Lacre beta test page

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+- **Important!** We would love to hear your feedback on your experience with Lacre. It will help us improve the service before it hits disroot permanently. Please have a look at this short [feedback form](https://cryptpad.disroot.org/form/#/2/form/view/mfX49LvUR7rM1EYXT2NZVcnCvlreWVrnvkoN6pcsE8Q/) Thanks a lot for your time!
+
+- In case the mail server becomes unstable, causing outage or in any way impacts the operation of the server, we will terminate tests. Keep track of updates on top of the page or tune in to our fediverse account at [disroot@doscial.weho.st](https://social.weho.st/@disroot/)

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+---      
+
+<br>
+Lacre requires you to use GPG enabled mail client  and create a GPG key pair (or use your existing one). Need help? Check [tutorials](https://social.weho.st/@disroot/)

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+<br>
+Lacre requires you to use GPG enabled mail client  and create a GPG key pair (or use your existing one). Need help? Check [tutorials](https://social.weho.st/@disroot/)
+<br>
+If you do not want to risk your @disroot.org account but would like to try lacre out, you can always use your @disr.it or @getgoogleoff.me aliases and generate keys for those addresses (eg. username@disr.it). Keep in mind that if you do use alternative account, you may not produce any meaningful traffic if you notmally don't use those addresses.

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+
+---      
+Exporting your public key is dead simple. In case you need help check those [tutorials](https://social.weho.st/@disroot/)