Add support for auth0

docs/auth0.md

@@ -0,0 +1,19 @@
+
+# Authentication with Auth0
+
+1. Create a new Auth0 application (Single page app)
+2. Create a new Auth0 API:
+   1. Choose `RS256` signing algorithm
+   2. Set identifier (audience) to `https://sist2`
+3. Download the Auth0 certificate from https://<domain>.auth0.com/pem (you can find the domain Applications->Basic information)
+4. Extract the public key from the certificate using `openssl x509 -pubkey -noout -in cert.pem > pubkey.txt`
+5. Start the sist2 web server
+
+Example options:
+```bash
+sist2 web \
+  --auth0-client-id XXX \
+  --auth0-audience https://sist2 \
+  --auth0-domain YYY.auth0.com \
+  --auth0-public-key-file /ZZZ/pubkey.txt
+```