Added papermc; updated fabric files

fabric/Dockerfile

@@ -1,30 +1,31 @@
-FROM openjdk:8-jre
+FROM openjdk:8-slim
 
-# This argument should be set when building
-ARG VERSION
-ARG JAR_URL="https://maven.fabricmc.net/net/fabricmc/fabric-installer/$VERSION/fabric-installer-$VERSION.jar"
+# Build arguments
+ARG FABRIC_VERSION
 
+# Create worlds and config directory
 WORKDIR /mc
+RUN mkdir worlds config
 
 # Download installer jar
-ADD "https://maven.fabricmc.net/net/fabricmc/fabric-installer/$VERSION/fabric-installer-$VERSION.jar" fabric-installer.jar
+ADD "https://maven.fabricmc.net/net/fabricmc/fabric-installer/$FABRIC_VERSION/fabric-installer-$FABRIC_VERSION.jar" fabric-installer.jar
 
 # Install fabric, sign eula & remove installer
 RUN java -jar fabric-installer.jar server -downloadMinecraft && \
-rm fabric-installer.jar && \
-echo "eula=true" > eula.txt
+rm fabric-installer.jar
 
 # Store the cache in an anonymous volume, which means it won't get stored in the other volumes
 VOLUME /mc/config/cache
 
+WORKDIR /mc/config
+
 # Default value to keep users from eating up all ram accidentally
 ENV XMS=4
 
-WORKDIR /mc/config
-# Source for flags:
-# https://aikar.co/2018/07/02/tuning-the-jvm-g1gc-garbage-collector-flags-for-minecraft/
-# Certain flags auto-scale if XMS is greater than 12 (see link for info)
-ENTRYPOINT mv -n /mc/*.jar /mc/config && java \
+# We copy over the server jar(s) as well to make the backup more reproducible to deploy
+ENTRYPOINT mv -n /mc/*.jar /mc/config && \
+echo "eula=true" > /mc/config/eula.txt && \
+java \
 -Xms"${XMS}G" \
 -Xmx"${XMX:-$XMS}G" \
 -XX:+UseG1GC \
@@ -50,4 +51,3 @@ ENTRYPOINT mv -n /mc/*.jar /mc/config && java \
 -jar fabric-server-launch.jar \
 --universe /mc/worlds \
 --nogui
-