Add doc for private registory

docs/installing-privateTemplate.md

@@ -0,0 +1,32 @@
+How to Fetch template from the private repository. In order to test the generator whether it fetch the template from the private repository or not, we will create a private repository in local and publish a template in the private repository.
+
+**Step 1:** Settuping Private Repository in Local:
+
+Installing [verdaccio](https://verdaccio.org/) using below command:
+
+`npm -i -g verdaccio`
+
+
+**Step 2:** Starting verdaccio locally and creating a new user:
+
+![Screenshot 2023-12-20 at 3.18.28 PM](https://hackmd.io/_uploads/H1gouVgwa.png)
+
+**Step 3:** Login in localhost:4873
+
+![Screenshot 2023-12-20 at 3.23.17 PM](https://hackmd.io/_uploads/r1votVlDp.png)
+
+
+**Step 4:** Publishing a template to the private repository using below command:
+
+```
+npm publish --registry </templateName>
+```
+
+**Step 5:** Fetching the template from the generator using an example.
+
+```javascript
+const Generator = require('../lib/generator');
+const gen = new Generator('@asyncapi/nodejs-template','asycnapi.yml', __dirname, {debug: true, registry: {url: 'http://localhost:4873/', username: 'aayush', password: '123'}});
+gen.installTemplate()
+```
+You will get complete template information