Dockerisation.

demo-exposition/src/main/kotlin/com/example/demo/exposition/debug/DebugController.kt

@@ -0,0 +1,16 @@
+package com.example.demo.exposition.debug
+
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/api/debug")
+class DebugController {
+    @GetMapping("/info")
+    fun debug(): String = """
+        {
+          "message": "Hello world!"
+        }
+    """.trimIndent()
+}