Update Dockerfile

Dockerfile

@@ -5,16 +5,18 @@ FROM eclipse-temurin:21-jre-jammy
 WORKDIR /server
 
 # Step 3: Download the official Minecraft server (version 1.21)
-# NOTE: This download link is for the latest version as of this writing.
 RUN apt-get update && apt-get install -y wget && \
     wget https://piston-data.mojang.com/v1/objects/450698d1863ab5180c25d7c804ef0fe6369dd1ba/server.jar
 
 # Step 4: Accept the Minecraft EULA
 RUN echo "eula=true" > eula.txt
 
-# Step 5: Expose the default Minecraft port
+# Step 5: NEW! Change ownership of the /server directory to the correct user
+# This gives the server permission to write its own files.
+RUN chown -R 1000:1000 /server
+
+# Step 6: Expose the default Minecraft port
 EXPOSE 25565
 
-# Step 6: Start the server directly, with full control over memory.
-# We are forcing it to start with 512MB and use a maximum of 1GB of RAM.
+# Step 7: Start the server directly, with full control over memory.
 CMD ["java", "-Xms512M", "-Xmx1G", "-jar", "server.jar", "nogui"]