Update Dockerfile

Dockerfile

@@ -1,22 +1,20 @@
-# Use an official OpenJDK image for Java 21 as a parent image
 FROM openjdk:21
 
-# Optional: Set the environment variable for Java's memory usage
-# Adjust Xmx and Xms values according to your server's specifications
-ENV JAVA_OPTS="-Xmx1024M -Xms1024M"
-
-# Create a directory for the Minecraft server
 WORKDIR /minecraft
 
-# Copy the Minecraft server's JAR file into the container's working directory
 COPY server.jar /minecraft
 
-# Expose the Minecraft server port
 EXPOSE 7860
 
-# Agree to Minecraft's EULA. Change this only if you have.
-# It is important to understand and agree to EULA before changing it to TRUE.
+ENV JAVA_OPTS="-Xmx1024M -Xms1024M"
 ENV EULA=true
 
-# Run the Minecraft server command. Replace 'server.jar' with the name of your server jar file, if different.
+# Create a cache directory and adjust permissions
+RUN mkdir -p /minecraft/cache && chown -R 1000:1000 /minecraft
+
+# Add a non-root user and switch to it
+RUN adduser --disabled-password --home /minecraft --gecos "" minecraft
+RUN chown -R minecraft:minecraft /minecraft
+USER minecraft
+
 CMD if [ "${EULA}" != "true" ]; then echo "You must accept the Minecraft EULA by setting the EULA env variable to TRUE."; exit 1; fi && java ${JAVA_OPTS} -jar server.jar --nogui --port 7860