Set default Docker image for MongoDB Dev Services

Author: wjglerum

docs/src/main/asciidoc/_attributes.adoc

@@ -22,6 +22,7 @@
 :amqp-image: ${amqp.image}
 :apicurio-registry-image: ${apicurio-registry.image}
 :lra-image: ${lra.image}
+:mongo-image: ${mongo.image}
 :jandex-version: ${jandex.version}
 :jandex-gradle-plugin-version: ${jandex-gradle-plugin.version}
 :kotlin-version: ${kotlin.version}

docs/src/main/asciidoc/mongodb-dev-services.adoc

@@ -40,7 +40,7 @@ It relies on a `compose-devservices.yml`, such as:
 name: <application name>
 services:
   mongo:
-    image: docker.io/mongo:7.0
+    image: ${mongo-image}
     ports:
       - "27017"
 ----

docs/src/main/asciidoc/mongodb.adoc

@@ -374,7 +374,7 @@ As by default, `MongoClient` is configured to access a local MongoDB database on
 If you want to use Docker to run a MongoDB database, you can use the following command to launch one:
 [source,bash]
 ----
-docker run -ti --rm -p 27017:27017 mongo:4.4
+docker run -ti --rm -p 27017:27017 {mongo.image}
 ----
 
 [NOTE]

extensions/mongodb-client/deployment/src/main/java/io/quarkus/mongodb/deployment/DevServicesBuildTimeConfig.java

@@ -3,6 +3,7 @@
 import java.util.Map;
 import java.util.Optional;
 
+import io.quarkus.runtime.annotations.ConfigDocDefault;
 import io.quarkus.runtime.annotations.ConfigDocMapKey;
 import io.quarkus.runtime.annotations.ConfigGroup;
 import io.smallrye.config.WithDefault;
@@ -22,6 +23,7 @@ public interface DevServicesBuildTimeConfig {
     /**
      * The container image name to use, for container based DevServices providers.
      */
+    @ConfigDocDefault(value = "`{mongo-image}`", escape = false)
     Optional<String> imageName();
 
     /**