Update Quarkus and PostgreSQL versions

Author: Breus

app/gradle.properties

@@ -1,7 +1,7 @@
 # Gradle properties
 
 quarkusPluginId=io.quarkus
-quarkusPluginVersion=3.26.3
+quarkusPluginVersion=3.31.1
 quarkusPlatformGroupId=io.quarkus.platform
 quarkusPlatformArtifactId=quarkus-bom
-quarkusPlatformVersion=3.26.3
+quarkusPlatformVersion=3.31.1

app/src/test/java/dev/blaauwendraad/recipe_book/test/PostgresResource.java

@@ -13,7 +13,7 @@
 public class PostgresResource implements QuarkusTestResourceLifecycleManager {
 
     private final PostgreSQLContainer<?> postgres =
-            new PostgreSQLContainer<>("postgres:latest").withStartupTimeout(Duration.ofSeconds(60));
+            new PostgreSQLContainer<>("postgres:18-alpine").withStartupTimeout(Duration.ofSeconds(60));
 
     @Override
     public Map<String, String> start() {