DOC: how to run integration tests

README_SETUP.md

+
 # Installation
 pip install . --user
 pip install tox --user
@@ -5,6 +6,11 @@ pip install tox --user
 # Run Unit Tests
 tox
 
-# Code Formatting
+# Run Integration Tests Locally
+1. Mount `integrationtests/full_test/extroot` to the folder that will be used as
+   extroot. E.g. `sudo mount -o bind extroot ../../../caosdb-deploy/profiles/empty/custom/extroot`
+2. Start an empty CaosDB instance
+3. run test.sh
 
+# Code Formatting
 autopep8 -i -r ./