title: explain proxy.config.json features angular 5
body: <pre><code>"/api/*": {
    "target": "https://localhost:8000/api",
    "secure": false,
    "logLevel": "debug",
    "pathRewrite": {
      "^/api": ""
    },
    "changeOrigin": true
  }
  </code></pre>
  
  <p>Please provide detailed use of each feature in this code snippet</p>
  
  <p>thank you for help</p>