diff --git a/Dockerfile b/Dockerfile
index 9664303..e0a78ca 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM openjdk:latest
+FROM openjdk:8-slim
 
 WORKDIR /mc_server
 COPY ./server .
 
 WORKDIR /mc_data
-CMD cp -r /mc_server/* . && java -Xmx1024M -Xms1024M -XX:ParallelGCThreads=2 -jar server.jar nogui
\ No newline at end of file
+CMD for file in $(ls /mc_server); do if test ! -s $file; then echo "copying $file" && cp -r /mc_server/$file .; fi; done && java -Xmx"$MAX_RAM"G -Xms"$MIN_RAM"G -jar server.jar nogui
\ No newline at end of file