Move theme to a saperate file

.roadhogrc

@@ -17,13 +17,5 @@
       ]
     }
   },
-  "theme": {
-    "font-size-base": "14px",
-    "badge-font-size": "12px",
-    "btn-font-size-lg": "@font-size-base",
-    "@menu-dark-bg": "#00182E",
-    "@menu-dark-submenu-bg": "#000B14",
-    "@layout-sider-background": "#00182E",
-    "layout-body-background": "#f0f2f5"
-  }
+  "theme": "./src/theme.js"
 }

src/theme.js

@@ -0,0 +1,10 @@
+// https://github.com/ant-design/ant-design/blob/master/components/style/themes/default.less
+module.exports = {
+  'font-size-base': '14px',
+  'badge-font-size': '12px',
+  'btn-font-size-lg': '@font-size-base',
+  'menu-dark-bg': '#00182E',
+  'menu-dark-submenu-bg': '#000B14',
+  'layout-sider-background': '#00182E',
+  'layout-body-background': '#f0f2f5',
+};