Improve formatting for Docker configuration example with Colima

See gh-42078

Author: martinfrancois

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/docs/antora/modules/gradle-plugin/pages/packaging-oci-image.adoc

@@ -602,7 +602,12 @@ TIP: With the `podman` CLI installed, the command `podman info --format='{{.Host
 ==== Docker Configuration for Colima
 
 The plugin can communicate with the Docker daemon provided by https://github.com/abiosoft/colima[Colima].
-The `DOCKER_HOST` environment variable can be set by using the command `export DOCKER_HOST=$(docker context inspect colima -f '{{.Endpoints.docker.Host}}').`
+The `DOCKER_HOST` environment variable can be set by using the following command:
+
+[source,shell,subs="verbatim,attributes"]
+----
+$ export DOCKER_HOST=$(docker context inspect colima -f '{{.Endpoints.docker.Host}}')
+----
 
 The plugin can also be configured to use Colima daemon by providing connection details similar to those shown in the following example:
 

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/docs/antora/modules/maven-plugin/pages/build-image.adoc

@@ -511,7 +511,12 @@ TIP: With the `colima` CLI installed, the command `podman info --format='{{.Host
 ==== Docker Configuration for Colima
 
 The plugin can communicate with the Docker daemon provided by https://github.com/abiosoft/colima[Colima].
-The `DOCKER_HOST` environment variable can be set by using the command `export DOCKER_HOST=$(docker context inspect colima -f '{{.Endpoints.docker.Host}}').`
+The `DOCKER_HOST` environment variable can be set by using the following command:
+
+[source,shell,subs="verbatim,attributes"]
+----
+$ export DOCKER_HOST=$(docker context inspect colima -f '{{.Endpoints.docker.Host}}')
+----
 
 The plugin can also be configured to use Colima daemon by providing connection details similar to those shown in the following example: