fixes issue with git-commit plugin

Author: tjuerge

Dockerfile

@@ -7,8 +7,11 @@ COPY .mvn/ .mvn/
 COPY mvnw pom.xml ./
 RUN ./mvnw dependency:go-offline
 
-# Copy source and build
+# Copy source and .git directory for git-commit-id-plugin
 COPY src ./src
+COPY .git ./.git
+
+# Build the application
 RUN ./mvnw clean package -DskipTests
 
 # Extract layers for better caching

pom.xml

@@ -138,6 +138,15 @@
 			<plugin>
 				<groupId>pl.project13.maven</groupId>
 				<artifactId>git-commit-id-plugin</artifactId>
+				<configuration>
+					<failOnNoGitDirectory>false</failOnNoGitDirectory>
+					<generateGitPropertiesFile>true</generateGitPropertiesFile>
+					<includeOnlyProperties>
+						<includeOnlyProperty>^git.branch$</includeOnlyProperty>
+						<includeOnlyProperty>^git.commit.id.(abbrev|full)$</includeOnlyProperty>
+						<includeOnlyProperty>^git.commit.time$</includeOnlyProperty>
+					</includeOnlyProperties>
+				</configuration>
 			</plugin>
  			<plugin>
 				<groupId>org.codehaus.mojo</groupId>