Update Snap Candidate to MongoDB 6.0.19. Updated WeKan Windows version numbers. Added Cron docs.

Thanks to xet7 !

docs/Webserver/Cron.md

@@ -0,0 +1,57 @@
+(TODO: Try to integrate this inside WeKan Snap Candidate, or change code so that these would not be needed.)
+
+WeKan has some memory leaks. To prevent WeKan becoming slow, this Cron script restarts WeKan Snap once every hour.
+
+1) Edit /root/hourly.sh
+
+```
+sudo su
+
+apt -y install nano cron
+
+nano /root/hourly.sh
+```
+2) There add this text:
+```
+snap stop wekan.wekan
+
+snap start wekan.wekan
+
+# Wait 10 seconds
+sleep 10
+
+# Disable telemetry
+/snap/wekan/current/usr/bin/mongosh wekan --eval 'disableTelemetry();' --port 27019
+
+# Snap: Disable apparmor="DENIED" at syslog
+# https://github.com/wekan/wekan/issues/4855
+/snap/wekan/current/usr/bin/mongosh wekan \
+--eval 'db.adminCommand({ setParameter: 1, diagnosticDataCollectionEnabled: false});' \
+--port 27019
+
+# Delete incomplete uploads so that they would not prevent starting WeKan
+/snap/wekan/current/usr/bin/mongosh wekan \
+--eval 'db.getCollection("cfs.attachments.filerecord").find( { "uploadedAt": { "$exists": true }, "copies.attachments" : null,"failures.copies.attachments.doneTrying" : {"$ne" : true}});' \
+--port 27019
+```
+3) Save and exit nano: Ctrl-o Enter Ctrl-x Enter
+
+4) Make hourly.sh script executeable, and edit cron:
+```
+chmod +x /root/hourly.sh
+
+export EDITOR=nano
+
+crontab -e
+```
+There at bottom, add this line, that will restart WeKan hourly, and log to textfile:
+```
+0 * * * * /root/hourly.sh >> /root/hourly-log.txt 2>&1
+```
+5) Save and exit nano: Ctrl-o Enter Ctrl-x Enter
+
+6) You can also list content of cron:
+
+```
+crontab -l
+```