add java and php images

java/Dockerfile.java21

@@ -0,0 +1,15 @@
+FROM registry.bobert.me/anthorob/coder-images:base
+
+USER root
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        openjdk-21-jdk \
+        maven \
+        && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+ENV JAVA_HOME=/usr/lib/jvm/java-21-openjdk-amd64
+ENV PATH="${JAVA_HOME}/bin:${PATH}"
+
+USER coder
+WORKDIR /home/coder