update docs

README.md

@@ -173,10 +173,15 @@ Environment Variables
 * **Option (Overwritable in admin page)**
     * OAUTH_GOOGLE_CLIENT_ID: Google API client id for OAuth login.
     * OAUTH_GOOGLE_CLIENT_SECRET: Google API client secret for OAuth login.
-    * OAUTH_GOOGLE_CALLBACK_URI: Google API callback URI for OAuth login (Set `https://${growi.host}/passport/google/callback`).
     * OAUTH_GITHUB_CLIENT_ID: GitHub API client id for OAuth login.
     * OAUTH_GITHUB_CLIENT_SECRET: GitHub API client secret for OAuth login.
-    * OAUTH_GITHUB_CALLBACK_URI: GitHub API callback URI for OAuth login (Set `https://${growi.host}/passport/github/callback`).
+    * OAUTH_TWITTER_CLIENT_ID: Twitter API client id for OAuth login.
+    * OAUTH_TWITTER_CLIENT_SECRET: Twitter API client secret for OAuth login.
+    * OAUTH_TWITTER_CLIENT_ID: Twitter API client id for OAuth login.
+    * OAUTH_TWITTER_CLIENT_SECRET: Twitter API client secret for OAuth login.
+    * SAML_ENTRY_POINT: IdP entry point
+    * SAML_ISSUER: Issuer string to supply to IdP
+    * SAML_CERT: PEM-encoded X.509 signing certificate string to validate the response from IdP
 
 
 Documentation