[Docs] Update README to a local file example

Author: Gitsko

README.md

@@ -170,6 +170,66 @@ http://example.com/typo3-patches.json
     ]
 }
 ```
+
+## Provide patches from local stored files
+You can use absolute paths or paths relative to the application root.
+
+composer.json:
+```json
+"repositories": [
+        {
+            "type": "package",
+            "package": {
+                "type": "metapackage",
+                "name": "vendor/package-patches",
+                "version": "1.0.0",
+                "require": {
+                    "netresearch/composer-patches-plugin": "~1.0"
+                },
+                "extra": {
+                    "patches": {
+                        "typo3/cms":     [
+                            {
+                                    "title": "[FEATURE] Allow registration of different login forms",
+                                    "url": "patches/example_local_file.patch"
+                            }
+                        ]
+                    }
+                }
+            }
+        }
+    ],
+   "require": {
+        ....
+    },
+```
+I have also added a new folder at the same level as the composer.json called "patches" and add a patch file example_local_file.patch like:
+
+```
+# This patch file was generated by NetBeans IDE
+# It uses platform neutral UTF-8 encoding and \n newlines.
+--- a/src/com/zoho/crm/library/exception/Logger.php
++++ b/src/com/zoho/crm/library/exception/Logger.php
+@@ -6,7 +6,7 @@
+ 	{
+ 		set_include_path(ZCRMConfigUtil::getConfigValue('applicationLogFilePath'));
+ 		$path=get_include_path();
+-		if($path{strlen($path)-1}!='\/')
++		if($path[strlen($path)-1]!='\/')
+ 		{
+ 			$path=$path."/";
+ 		}
+
+
+```
+
+*Note* that the patch will be called with the option -p1 (remove the first slash) and in the directory of the library.
+
+Then run the commands to update the dependency and to install patches:
+```
+composer update vendor/package-patches
+composer install
+```
 
 ## Requiring the patches:
 just require the package with the patches.