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11	11	** You can't install a 64 bit Ubuntu onto a Raspberry PI Zero or Zero W, because it requires ARMv7 processor and the Zero series is based on ARMv6.
12	12	*** Probably the smallest choice would be Raspberry Pi Model 3 A+.
13	13
	14	+When installing "nodejs", make sure you're using a more recent version such as 16.x.x.  Run "node -v" to verify your node version.  If you're running an older version of Linux, you may have to manually override the installed version in order to get the version you need; currently nodejs 14, 12, or 10.  I ran this command to setup apt-get to install version 14:
	15	+
	16	+(% class="box" %)
	17	+(((
	18	+curl -sL https:~/~/deb.nodesource.com/setup_14.x -o nodesource_setup.sh
	19	+)))
	20	+
	21	+You also need to make sure you have Mongo version 3.x or later.  You can setup the apt-get install for version 4.x here:
	22	+
	23	+[[https:~~/~~/www.mongodb.com/docs/manual/tutorial/install-mongodb-on-ubuntu/>>https://www.mongodb.com/docs/manual/tutorial/install-mongodb-on-ubuntu/]]
	24	+
	25	+(If you end up with the wrong version, use "dpkg -l" to see the package name.  There were probably other packages also installed at the same time, so remove all all "mongo" pages using "apt-get remove", then check "dpkg -l" to see if any are in the "rc" state.  If so, purge them with "dpkg ~-~-purge".  Finally, you can reinstall the correct version again.)
	26	+
14	14	I finally ended up using a Raspberry Pi model 3 A+.  This is an ARMv7 processor, so it can do 64 bit Linux, it has built-in Wifi, and it's still small and cheap.  The system doesn't have a lot of memory, so I purchased a 32Gb micro-SD card and [[created a 16Gb swapfile>>https://linuxize.com/post/how-to-add-swap-space-on-ubuntu-18-04/]].  I installed Ubuntu 19 from here:
15	15
16	16	[[https:~~/~~/ubuntu.com/download/raspberry-pi>>https://ubuntu.com/download/raspberry-pi]]