Add VOCABULARY_URL to config schema in readme

[arvados-workbench2.git] / README.md

diff --git a/README.md b/README.md
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+++ b/README.md
@@ -26,6 +26,25 @@ yarn install
 yarn build
 </pre>
 
+### Build time configuration
+You can customize project global variables using env variables. Default values are placed in the `.env` file.
+
+Example:
+```
+REACT_APP_ARVADOS_CONFIG_URL=config.json yarn build
+```
+
+### Run time configuration
+The app will fetch runtime configuration when starting. By default it will try to fetch `/config.json`. You can customize this url using build time configuration.
+
+Currently this configuration schema is supported:
+```
+{
+    "API_HOST": "string",
+    "VOCABULARY_URL": "string"
+}
+```
+
 ### Licensing
 
 Arvados is Free Software. See COPYING for information about Arvados Free