Add possibility to modifiy API_HOST using env variables

[arvados-workbench2.git] / README.md

diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -26,6 +26,14 @@ yarn install
 yarn build
 </pre>
 
+### Configuration
+You can customize project global variables using env variables. Default values are placed in the `.env` file.
+
+Example:
+```
+REACT_APP_ARVADOS_API_HOST=localhost:8000 yarn start
+```
+
 ### Licensing
 
 Arvados is Free Software. See COPYING for information about Arvados Free