wip: migrate to mono-repo. SPN has already been moved to spn/

spn/TESTING.md

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+# Testing SPN
+
+This page documents ways to test if the SPN works as intended.
+
+⚠ Work in Progress. Currently we are just collecting helpful things we find.
+
+## Test Multi-Identity Routing
+
+In order to test if the multi-identity routing is working, you can request multiple websites to display your public IP.
+If they show different values, multi-identity routing is working.
+
+### Websites
+
+- <https://icanhazip.com>
+- <https://ipecho.net>
+- <https://ipinfo.io>
+- <https://ipinfo.tw>
+
+### Terminal
+
+```sh
+curl https://icanhazip.com
+curl https://ipecho.net/plain
+curl https://ipinfo.io/ip
+curl https://ipinfo.tw/ip
+```