Developer-Documentation.md

+## Setup of the basic application
+
+To setup the root application we use Next.js.
+At first we have to install Node.js (version 10.13 or later). After that we use the console and direct to a new folder for our project (we could also open the folder in VSCode and use the terminal) and run the command:
+```js
+npx create-next-app@latest nextjs-blog --use-npm --example "https://github.com/vercel/next-learn/tree/master/basics/learn-starter"
+```
+Now an example app from Next.js is being created in this directory:
+
+![image](uploads/cf505dd05f865edac99672237638dafa/image.png)
+
+To run the application we have to change into the directory called **nextjs-blog**:
+```sh
+cd nextjs-blog
+```
+
+Then we run the command:
+```js
+npm run dev
+```
+which starts the Next.js app`s development server on port 3000.<br>
+
+![image](uploads/f8e849ea160ad1ef87cfa1ad8a714ede/image.png)
+
+To check if the app is working properly we can just open http://localhost:3000 from our browser, wich should look like this:
+![image](uploads/210dde5ea95c4ad9fcb4a90821134cf7/image.png)
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