X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/e6039bec0497aa7e1391958e5c4f84bbaeef653e..49f27beea17ab1ef448f3c485dcdf9bea0a740b9:/README.md

diff --git a/README.md b/README.md
index 998d424662..e2e14ce47e 100644
--- a/README.md
+++ b/README.md
@@ -40,10 +40,33 @@ The app will fetch runtime configuration when starting. By default it will try t
 Currently this configuration schema is supported:
 ```
 {
-    "API_HOST": "string"
+    "API_HOST": "string",
+    "VOCABULARY_URL": "string",
+    "FILE_VIEWERS_CONFIG_URL": "string",
 }
 ```
 
+#### API_HOST
+
+The Arvados base URL. 
+
+The `REACT_APP_ARVADOS_API_HOST` environment variable can be used to set the default URL if the run time configuration is unreachable.
+
+#### VOCABULARY_URL
+Local path, or any URL that allows cross-origin requests. See 
+[Vocabulary JSON file example](public/vocabulary-example.json).
+
+To use the URL defined in the Arvados cluster configuration, remove the entire `VOCABULARY_URL` entry from the runtime configuration. Found in `/config.json` by default.
+
+### FILE_VIEWERS_CONFIG_URL
+Local path, or any URL that allows cross-origin requests. See:
+
+[File viewers config file example](public/file-viewers-example.json)
+
+[File viewers config scheme](src/models/file-viewers-config.ts)
+
+To use the URL defined in the Arvados cluster configuration, remove the entire `FILE_VIEWERS_CONFIG_URL` entry from the runtime configuration. Found in `/config.json` by default.
+
 ### Licensing
 
 Arvados is Free Software. See COPYING for information about Arvados Free