first version of Dockerfile

Dockerfile

@@ -0,0 +1,24 @@
+FROM openjdk:11-jdk-slim
+
+# Install dependencies
+RUN apt-get update && \
+    apt-get install -y maven wget unzip curl zip && \
+    rm -rf /var/lib/apt/lists/*
+
+# Install Gradle
+RUN wget https://services.gradle.org/distributions/gradle-7.5-bin.zip -P /tmp && \
+    unzip /tmp/gradle-7.5-bin.zip -d /opt && \
+    ln -s /opt/gradle-7.5/bin/gradle /usr/bin/gradle && \
+    rm -rf /tmp/gradle-7.5-bin.zip
+
+# Install SDKMAN!
+RUN curl -s "https://get.sdkman.io" | bash
+
+# Install multiple Java versions
+RUN bash -c "source $HOME/.sdkman/bin/sdkman-init.sh && \
+    sdk install java 8.0.302-open && \
+    sdk install java 11.0.12-open && \
+    sdk install java 17.0.12-oracle && \
+    sdk install java 21.0.2-open && \
+    sdk install java 23-open && \
+    sdk default java 23-open"