Add comments to Dockerfile

Dockerfile

@@ -1,20 +1,28 @@
 FROM amazoncorretto:8
 
+# Change working directory
 WORKDIR /home
 
+# Install necessary libraries
 RUN yum -y install unzip aws-cli
 RUN yum -y install tar
 RUN yum -y install xz
-RUN mkdir input output init
 
+# Copy model jar
 COPY arcade-3.1.jar ./arcade.jar
 
+# Copy entrypoint script and make executable
 COPY arcade.sh ./arcade.sh
 RUN chmod +x ./arcade.sh
 
+# Create input and output directories
+RUN mkdir input output init
+
+# Create non root user
 RUN yum -y install shadow-utils
 RUN useradd nonroot
 RUN chown nonroot /mnt/ input/ output/ init/
 USER nonroot
 
+# Set entrypoint scipt
 ENTRYPOINT ./arcade.sh