Add extrepo instructions

[FedericoCeratto]

FIxes #1162

• make sure that outreach happens
• when merging, double check that the publication date is today

[bassosimone]

I think we should figure out why I get such an old version of ooniprobe-cli when using extrepo. I have documented the procedure I followed and the packages I've got.

[bassosimone]

@FedericoCeratto these instructions does not seem to work for me on Ubuntu 20.04 (Focal). Please, see the following excerpt from my failed attempt at installing ooniprobe:

root@b2a9b547247b:/# extrepo enable ooni
gpgv: Signature made Mon May 23 15:11:56 2022 UTC
gpgv:                using RSA key 7A8502E9FF4765B162A964171283BEE904FB0E04
gpgv: Good signature from "Debian external repositories signing key (experimental)"

root@b2a9b547247b:/# apt install ooniprobe-cli
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package ooniprobe-cli

root@b2a9b547247b:/# cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.4 LTS"
root@b2a9b547247b:/# 

Then, I figured out that the correct set of commands is probably:

Suggested change

	sudo apt install ooniprobe-cli
	sudo apt update
	sudo apt install ooniprobe-cli

However, after installing ooniprobe-cli using extrepo I found a disappointing fact:

Setting up ooniprobe-cli (3.10.0-beta.1~833) ...

If I'm using the apt-key method, which I just did with a new Focal container, here's what I get:

Setting up ooniprobe-cli (3.14.1) ...

Why is the version so old when using extrepo?

[McLP2]

The variant I proposed in #1580 (sorry, I did not look before if someone was already working on it) is probably the easier solution.