Rename example conf, change Makefile & entrypoint

Makefile

@@ -3,12 +3,12 @@
 dist: help
 help:
 	@echo "make help  [Displays help]"
+	@echo "     check [Check all shell scripts for issues]"
 	@echo "     build [Builds the docker image]"
-	@echo "     test  [Tests the docker image]"
 	@echo "     clean [Cleans the docker build cache]"
-build:
+check:
+	shellcheck *.sh
+build: check
 	docker buildx build --progress tty --tag mcserverdocker:repobuild .
 clean:
 	docker buildx prune --all --force
-test:
-	docker run mcserverdocker:repobuild

entrypoint.sh

@@ -60,7 +60,7 @@ function kill_server() {
 
 function run() {
   echo ":: Starting server"
-  cd /data
+  cd /data||exit 69
   # We want to use ${ARGS} without using parenthesis
   # shellcheck disable=SC2086
   "/usr/lib/jvm/java-${MCSD_JAVA_VERSION}-openjdk/bin/java" -jar "/data/server.jar" ${ARGS} &