change to openjdk:11-jre-slim base (#1)

run as minecraft user UID 200

Author: colincoleman

README.md

@@ -23,7 +23,7 @@ This also give you easy access to the items in the data folder to allow you to d
 
 ### Using Docker Compose
 Instead of remembering and typing long chains of parameters and docker options you can create a docker-compose.yml file
-(example [here](docker-compose.yml)) file 
+(example [here](docker-compose.yml))
 and simply run the command `docker-compose up` to bring up the server with a specified data folder and then use the
 command `docker-compose down` to stop and get rid of the container.  Later when you wish to restart the server you can 
 run `docker-compose up` again and the world persisted on your local volume will be attached to a new container running a

docker/Dockerfile

@@ -1,19 +1,27 @@
-FROM azul/zulu-openjdk-alpine:8u212-jre
+FROM openjdk:11-jre-slim
 MAINTAINER colincoleman
 
-RUN mkdir -p /home/minecraft/data
+RUN useradd -r -u 200 -m -c "minecraft account" -d /home/minecraft -s /bin/false minecraft
 
-COPY entrypoint.sh /home/minecraft/
+ADD https://launchermeta.mojang.com/mc/game/version_manifest.json /home/minecraft/version_manifest.json
 
-RUN apk update &&\
-  apk add jq
+RUN apt-get update && \
+    apt-get install -y \
+      jq \
+      wget && \
+    LATESTVER=`cat /home/minecraft/version_manifest.json|jq -r .latest.release` &&\
+    wget  -O /home/minecraft/versionfile.json `cat /home/minecraft/version_manifest.json | jq -r ".versions[] | select(.id==\"$LATESTVER\")|.url"` &&\
+    DOWNLOADURL=`cat /home/minecraft/versionfile.json |jq -r '.downloads.server.url'` &&\
+    wget -O /home/minecraft/server.jar $DOWNLOADURL &&\
+    apt-get remove -y \
+      jq \
+      wget && \
+    rm -rf /var/lib/apt/lists/* && \
+    mkdir /home/minecraft/data && \
+    chown minecraft:minecraft /home/minecraft/data &&
 
-ADD https://launchermeta.mojang.com/mc/game/version_manifest.json /home/minecraft/version_manifest.json
+USER minecraft
 
-RUN LATESTVER=`cat /home/minecraft/version_manifest.json|jq -r .latest.release` &&\
-  wget  -O /home/minecraft/versionfile.json `cat /home/minecraft/version_manifest.json | jq -r ".versions[] | select(.id==\"$LATESTVER\")|.url"` &&\
-  DOWNLOADURL=`cat /home/minecraft/versionfile.json |jq -r '.downloads.server.url'` &&\
-  wget -O /home/minecraft/server.jar $DOWNLOADURL &&\
-  echo "done"
+COPY entrypoint.sh /home/minecraft/
 
 ENTRYPOINT ["/home/minecraft/entrypoint.sh"]