add grafana loki config

src/main/java/zw/qantra/tm/domain/controllers/TestController.java

@@ -1,6 +1,8 @@
 package zw.qantra.tm.domain.controllers;
 
 import lombok.RequiredArgsConstructor;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.Authentication;
@@ -19,6 +21,19 @@ public class TestController {
     private final EmailService emailService;
     private final TransactionService transactionService;
 
+    private static final Logger logger = LoggerFactory.getLogger(TestController.class);
+
+    @GetMapping("/test-logs")
+    public String testLogs() {
+        logger.trace("This is a TRACE log");
+        logger.debug("This is a DEBUG log");
+        logger.info("This is an INFO log");
+        logger.warn("This is a WARN log");
+        logger.error("This is an ERROR log");
+
+        return "Logs sent to OpenTelemetry!";
+    }
+
     @PostMapping("/dbtest")
     public ResponseEntity<Object> dbtest(@RequestBody Transaction transaction) {
         transactionService.save(transaction);