add OpenAPI config

server/application-server/src/main/java/de/tum/in/www1/hephaestus/OpenAPIConfiguration.java

@@ -0,0 +1,30 @@
+package de.tum.in.www1.hephaestus;
+
+import org.springframework.context.annotation.Configuration;
+
+import io.swagger.v3.oas.annotations.OpenAPIDefinition;
+import io.swagger.v3.oas.annotations.info.Contact;
+import io.swagger.v3.oas.annotations.info.Info;
+import io.swagger.v3.oas.annotations.info.License;
+import io.swagger.v3.oas.annotations.servers.Server;
+
+@Configuration
+@OpenAPIDefinition(
+  info = @Info(
+    title = "Hephaestus API", 
+    description = "API documentation for the Hephaestus application server.", 
+    contact = @Contact(
+      name = "Felix T.J. Dietrich",
+      email = "[email protected]"
+    ), 
+    license = @License(
+      name = "MIT License",
+      url = "https://github.com/ls1intum/Hephaestus/blob/develop/LICENSE"
+    )
+  ), 
+  servers = {
+    @Server(url = "/", description = "Default Server URL"),
+  }
+)
+public class OpenAPIConfiguration {
+}