Fix overwriting latest Tag in CI

Avoid the latest tag being overwritten without it being explicitly supplied

pom.xml

@@ -232,7 +232,7 @@
 						<artifactId>spring-boot-maven-plugin</artifactId>
 						<configuration>
 							<image>
-								<name>${CI_REGISTRY_IMAGE}/${project.artifactId}</name>
+								<name>${CI_REGISTRY_IMAGE}/${project.artifactId}:0.0.1-main</name>
 								<tags>${IMAGE_TAGS}</tags>
 								<publish>true</publish>
 							</image>
@@ -272,7 +272,7 @@
 						<artifactId>spring-boot-maven-plugin</artifactId>
 						<configuration>
 							<image>
-								<name>docker.ozg-sh.de/${project.artifactId}</name>
+								<name>docker.ozg-sh.de/${project.artifactId}:0.0.1-main</name>
 								<tags>${IMAGE_TAGS}</tags>
 								<publish>true</publish>
 							</image>