Updated dev instructions.

README.md

@@ -24,12 +24,37 @@ cd consumer
 composer create-project --prefer-dist drevops/scaffold="@dev" --repository '{"type": "path", "url": "../scaffold", "options": {"symlink": false}}' t1
 ```
 
-## Maintenance
 
+## Maintenance
 
     composer install
     composer lint
     composer test
 
 
+### Debugging
+
+Run once:
+```bash
+cd scaffold
+composer install
+
+export COMPOSER_ALLOW_XDEBUG=1
+export COMPOSER_DEBUG_EVENTS=1
+export DREVOPS_SCAFFOLD_VERSION=@dev
 
+cd ../consumer 
+```
+
+Run as needed (from `consumer`):
+```bash
+# No-install
+rm -Rf t1 >/dev/null && php ../scaffold/vendor/composer/composer/bin/composer create-project --prefer-dist drevops/scaffold="@dev" --repository '{"type": "path", "url": "../scaffold", "options": {"symlink": false}}' --no-install t1
+```   
+
+or
+
+```bash
+# Full
+rm -Rf t1 >/dev/null && php ../scaffold/vendor/composer/composer/bin/composer create-project --prefer-dist drevops/scaffold="@dev" --repository '{"type": "path", "url": "../scaffold", "options": {"symlink": false}}' t1
+```