Fixed attempted rsync when WORLD not set

Dockerfile

@@ -1,4 +1,4 @@
-FROM adoptopenjdk/openjdk13:alpine-jre
+FROM openjdk:8u212-jre-alpine
 
 LABEL maintainer "itzg"
 
@@ -67,7 +67,7 @@ COPY log4j2.xml /tmp/log4j2.xml
 WORKDIR /data
 
 ENV UID=1000 GID=1000 \
-  MEMORY="1G" \
+  JVM_XX_OPTS="-XX:+UseG1GC" MEMORY="1G" \
   TYPE=VANILLA VERSION=LATEST FORGEVERSION=RECOMMENDED SPONGEBRANCH=STABLE SPONGEVERSION= FABRICVERSION=LATEST LEVEL=world \
   PVP=true DIFFICULTY=easy ENABLE_RCON=true RCON_PORT=25575 RCON_PASSWORD=minecraft \
   LEVEL_TYPE=DEFAULT SERVER_PORT=25565 ONLINE_MODE=TRUE SERVER_NAME="Dedicated Server" \

start-finalSetupWorld

@@ -10,7 +10,7 @@ else
   worldDest=/data/$LEVEL
 fi
 
-if [[ "$WORLD" ]] &&  isTrue "${FORCE_WORLD_COPY}" || [ ! -d "$worldDest" ]; then
+if [[ "$WORLD" ]] && ( isTrue "${FORCE_WORLD_COPY}" || [ ! -d "$worldDest" ] ); then
   if isURL $WORLD; then
     curl -fsSL "$WORLD" -o /tmp/world.zip
     zipSrc=/tmp/world.zip