Update Dockerfile

Dockerfile

@@ -1,14 +1,22 @@
-# Use the itzg/minecraft-server image as the base
-FROM itzg/minecraft-server
+# Use an official OpenJDK image for Java 17 as a parent image
+FROM openjdk:17
 
-# While we cannot directly translate the -p or --name flags into a Dockerfile
-# those are runtime parameters, you can specify EXPOSE to hint at ports to be mapped
+# 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
 
-# The ENTRYPOINT or CMD from the base image (itzg/minecraft-server) is already set to run the server
-# If you need to customize server properties or configurations, you could add COPY or RUN instructions here
-# For example:
-# COPY server.properties /data/server.properties
+# 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 EULA=true
 
-# Note: Environment variables can be set with ENV commands if you need to configure the Minecraft server further
-ENV EULA=TRUE
+# Run the Minecraft server command. Replace 'server.jar' with the name of your server jar file, if different.
+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