Added config-file arguments with an example

Author: ProtocolNebula

examples/transform-config.json

@@ -0,0 +1,7 @@
+{
+  "clean": true,
+  "file": "./examples/openApiFiles/passportescaperoom.com.json",
+  "outputFolder": "./examples/generated/angular2",
+  "template": "angular2",
+  "saveFile": "./openApiFiles/passportescaperoom.com"
+}

package.json

@@ -27,7 +27,7 @@
     "start:webpack": "npx webpack --watch",
     "build": "tsc",
     "build:webpack": "npx webpack --mode production",
-    "generate:examples": "npm start -- -f examples/openApiFiles/passportescaperoom.com.json -o examples/generated/angular2 -t angular2",
+    "generate:examples": "npm start -- --config-file ./examples/transform-config.json",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "license": "ISC",

src/services/arguments.service.ts

@@ -1,4 +1,5 @@
 import * as yargs from 'yargs';
+import { readFileSync } from 'fs';
 
 export const argumentsInstance = yargs
   .alias('version', 'v')
@@ -9,6 +10,15 @@ export const argumentsInstance = yargs
     'Convert a Swagger JSON file to compatible-angular API',
   )
 
+  .config('config-file', (configPath) => {
+    return JSON.parse(readFileSync(configPath, 'utf-8'));
+  })
+  .describe(
+    'config-file',
+    'Configuration file to use (values from cli will overwrite the files one).',
+  )
+  .default('save-file', './openapi_temp')
+
   .nargs('save-file', 1)
   .alias('s', 'save-file')
   .describe(