Configure internal management server on port 9090 with Prometheus metrics

backend/Dockerfile

@@ -15,4 +15,5 @@ ENV SPRING_PROFILES_ACTIVE=prod
 ENV SERVER_PORT=8080
 
 EXPOSE 8080
+EXPOSE 9090
 ENTRYPOINT ["java", "-jar", "app.jar"]

backend/pom.xml

@@ -61,6 +61,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
+        <dependency>
+            <groupId>io.micrometer</groupId>
+            <artifactId>micrometer-registry-prometheus</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-cache</artifactId>

backend/src/main/resources/application.yml

@@ -24,13 +24,19 @@ server:
   port: 8080
 
 management:
+  server:
+    port: 9090
   endpoints:
     web:
       exposure:
-        include: health,info
+        include: health,info,metrics,prometheus
   endpoint:
     health:
       show-details: always
+  metrics:
+    export:
+      prometheus:
+        enabled: true
   info:
     app:
       name: VigiSUS

docker-compose.yml

@@ -34,6 +34,7 @@ services:
       GEMINI_API_KEY: ${GEMINI_API_KEY:-}
     ports:
       - "8080:8080"
+      - "127.0.0.1:9090:9090"
     depends_on:
       postgres:
         condition: service_healthy