X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/fdc9e2f707b15d520ec0a39e7cfe52ef23a958f4..646e1d88d8aac461e0a13b6c0f1aa1b198e3659c:/README.md

diff --git a/README.md b/README.md
index ea9bc02fc1..e2e14ce47e 100644
--- a/README.md
+++ b/README.md
@@ -41,10 +41,32 @@ Currently this configuration schema is supported:
 ```
 {
     "API_HOST": "string",
-    "VOCABULARY_URL": "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