added settings in LuticateApplication

src/Utils/Controller/LuticateApplication.php

 
         $this->_config["databases"] = static::resolveDatabases($this->_config["databases"]);
 
+        if (!isset($this->_config['settings'])) {
+            $this->_config['settings'] = [];
+        }
+
         $this->_clients = new \SplObjectStorage;
         $this->_router = new LuRoute();
         LuLog::setLogFilePath(__DIR__ . "/../../../../../../". $this->_config["logs"]);
         self::$_app = $this;
     }
 
+    public function getSetting($name)
+    {
+        $value = getenv("lu_setting_" . $name);
+        if ($value === false) {
+            if (isset($this->_config['settings'][$name])) {
+                $value = $this->_config['settings'][$name];
+            }
+            else {
+                $value = null;
+            }
+        }
+        return $value;
+    }
+
     /**
      * @return LuRoute
      */

tests/LuApplicationTest.php

         $dbs = ["mydb", $db1];
         $this->assertSame([$db1, $db1], LuticateApplication::resolveDatabases($dbs));
     }
+
+    public function testSettings1()
+    {
+        $this->assertSame(42, LuticateApplication::getInstance()->getSetting("test"));
+    }
+
+    public function testSettings2()
+    {
+        $this->assertNull(LuticateApplication::getInstance()->getSetting("not-a-setting"));
+    }
+
+    public function testSettings3()
+    {
+        putenv("lu_setting_test=24");
+        $this->assertSame("24", LuticateApplication::getInstance()->getSetting("test"));
+    }
 }

tests/config.example.json

       "host": "127.0.0.1", "database": "project",
       "username": "project", "password": "password"
     }
-  ]
+  ],
+  "settings": {
+
+  }
 }