[TASK] Add hint regarding the installer path for the sgc

README.md

@@ -14,6 +14,17 @@ can install the sgc by running
 composer require sgalinski/sgc-core
 ```
 
+If you don't want to install the sgc inside the vendor directory, you can define an own directory in the extra
+section of your main project composer.json. 
+
+```
+"installer-paths": {
+  "./sgc-core/": [
+    "sgalinski/sgc-core"
+  ]
+}
+```
+
 Then run the installer:
 
 ```bash