• Clone this GIT project.
• Make sure it is a Maven project and Maven is executed to load dependencies.
• Create an Account at https://openai.com & log in
• Create API key at https://beta.openai.com/account/api-keys
• Store the key in application.properties file in cloned project.
• Start it as Spring Boot application.
• Browser opens index.html automatically, hosted at:
  • http:https://localhost:8080/ (for chatting with ChatGPT)
  • http:https://localhost:8080/image (for drawing images with DALL-E)

If you need a proxy to communicate with Internet (ChatGPT API is in Internet), adapt ChatGptController.java like this:

• Replace: private HttpClient client = HttpClient.newHttpClient();
• with: private HttpClient client = HttpClient.newBuilder().proxy(ProxySelector.of(InetSocketAddress.createUnresolved("proxy.host.com", 8080))).build();

• OpenAI API documentation: https://beta.openai.com/docs/api-reference/completions/create
• Visit Elmar Brauch's German blog to read in general about Spring & Java: https://agile-coding.blogspot.com