switch to debian base

Containerfile

@@ -1,11 +1,9 @@
 
-FROM ubuntu:${ubuntu.version}
+FROM debian:${debian.version}-slim
 
 # Configure standard JAVA parameters
 ENV JAVA_MEMORY_INIT=128m
 ENV JAVA_MEMORY_MAX=512m
-ENV JAVA_HOME=/usr/local/lib/jvm/java-openjdk-jbr
-ENV JRE_HOME=/usr/local/lib/jvm/java-openjdk-jbr
 ENV JAVA_OPTS=
 ENV ENABLE_HOTSWAP=true
 ENV ENABLE_JDWP=true

pom.xml

@@ -8,10 +8,9 @@
 	<packaging>pom</packaging>
 
 	<properties>
-        <!-- The release version of Ubuntu to use as the base -->
-        <!-- See: https://hub.docker.com/_/ubuntu -->
-        <!-- This has very little impact and may be replaced -->
-        <ubuntu.version>25.04</ubuntu.version>
+		<!-- The release version of Debian Linux to use as the base -->
+		<!-- See: https://hub.docker.com/_/debian -->
+		<debian.version>12.14</debian.version>
 
 		<namespace.prefix>${project.artifactId}</namespace.prefix>
 

src/main/containerd/containerd-entrypoint.sh

@@ -1,9 +1,8 @@
 #!/bin/sh
 . /usr/local/bin/${namespace.prefix}-setenv.sh
 
-JAVA_CP="/var/lib/jvm/lib:/var/lib/jvm/lib/*"
-JAVA_CP="${JAVA_CP}:/var/lib/jvm/dev/classes:/var/lib/jvm/dev/classes-extra1:/var/lib/jvm/dev/classes-extra2:/var/lib/jvm/dev/classes-extra3:/var/lib/jvm/dev/classes-extra4:/var/lib/jvm/dev/classes-extra5:/var/lib/jvm/dev/classes-extra6:/var/lib/jvm/dev/classes-extra7"
-JAVA_CP="${JAVA_CP}:/var/lib/jvm/dev/lib/*:/var/lib/jvm/dev/lib-extra1/*:/var/lib/jvm/dev/lib-extra2/*:/var/lib/jvm/dev/lib-extra3/*:/var/lib/jvm/dev/lib-extra4/*:/var/lib/jvm/dev/lib-extra5/*:/var/lib/jvm/dev/lib-extra6/*:/var/lib/jvm/dev/lib-extra7/*"
-EXEC_JAVA_OPTS="${JAVA_OPTS} -classpath ${JAVA_CP}"
-
-exec ${JAVA_HOME}/bin/java ${EXEC_JAVA_OPTS} ${JAVA_CLASS}
+if [ -z $1 ]; then
+    exec /bin/bash
+else
+    exec ${JAVA_HOME}/bin/java $@
+fi

src/main/containerd/setenv.sh

@@ -1,4 +1,6 @@
 #!/bin/sh
+JAVA_HOME=/usr/local/lib/jvm/java-openjdk-jbr
+JRE_HOME=/usr/local/lib/jvm/java-openjdk-jbr
 JAVA_OPTS="${JAVA_OPTS} -Xms${JAVA_MEMORY_INIT} -Xmx${JAVA_MEMORY_MAX}"
 
 if [ "${ENABLE_HOTSWAP}" = "true" ]; then