diff --git a/Dockerfile b/Dockerfile
index e0a78ca..e6b8226 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,7 @@ FROM openjdk:8-slim
 
 WORKDIR /mc_server
 COPY ./server .
-
 WORKDIR /mc_data
+
+# Copy files only if they don't yet exist (server.jar, server.properties, etc) and start the server
 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
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