modified paper mc scripts to work for arbitrary servers

.gitignore

@@ -0,0 +1 @@
+server

Dockerfile

@@ -0,0 +1,28 @@
+FROM alpine:latest
+
+ENV MINECRAFT_VERSION= \
+    PAPER_BUILD="latest" \
+    EULA="false" \
+    MC_RAM=""
+
+
+
+RUN apk update && \
+    apk add openjdk21-jre && \
+    apk add bash && \
+    apk add curl && \
+    apk add jq
+
+RUN addgroup -S servergrp
+RUN adduser -S server -G servergrp -D -u 1000
+USER server
+RUN mkdir /home/server/instance
+#RUN chown -hR server:servergrp /home/server/instance
+COPY setup.sh /home/server/
+
+
+CMD ["bash", "/home/server/setup.sh"]
+
+EXPOSE 25565
+VOLUME /home/server/instance
+

LICENSE

@@ -0,0 +1,9 @@
+MIT License
+
+Copyright (c) 2025 Patrick Kuhs
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Makefile

@@ -0,0 +1,17 @@
+build:
+	docker build -t mc-env-docker .
+
+run: build
+	docker run -it --name mc-env mc-env-docker 
+
+test-env: build
+	docker run -it -e RUNSCRIPT -e EULA="true" -e WHITELIST="true" -e SEED="123" -e MAX_PALYERS="1" -e DIFFICULTY="normal" -e GAMEMODE="survival" -e "MOTD"="Local Docker Test" -p 25565:25565 -p 8100:8100 --volume ./server:/home/server/instance:z --name mc-env mc-env-docker
+
+clean:
+	docker rm mc-env
+	docker image rm mc-env-docker
+	echo "Holzhakker" > ./server/whitelist.prep
+	echo "Holzhakker" > ./server/op.prep
+
+debug:
+	docker run --rm -it --entrypoint bash --name mc-env-debug mc-env-docker

docker-compose.yml

@@ -0,0 +1,22 @@
+version: "3"
+
+services:
+  server:
+    image: papermc-docker
+    container_name: YOUR_CONTAINER_NAME
+    restart: always
+    volumes:
+      - "YOUR_SERVER_LOCATION":/home/server/instance:z
+    ports:
+      - "YOUR_PORT:25565"
+    environment:
+      SERVER_MEMORY: "2G"
+      EULA: "true"
+      SEED: "abc"
+      # provide a txt file with the usernames of the players to be whitelisted in the server folder to automatically add them to the whitelist
+      WHITELIST: "true"
+      MAX_PLAYERS: "20"
+      DIFFICULTY: "easy"
+      GAMEMODE: "survival"
+      MOTD: "A Dockerized Minecraft Server"
+      ENFORCE_SECURE_PROFILE: "false"

setup.sh

@@ -0,0 +1,133 @@
+#!/bin/bash
+
+SERVER_DIR=/home/server/instance
+cd $SERVER_DIR
+
+: ${MINECRAFT_VERSION:='latest'}
+
+MINECRAFT_VERSION="${MINECRAFT_VERSION,,}"
+PROJECT="paper"
+
+# prepare performance opts for java
+
+JAVA_OPTS=" -XX:+UseG1GC -XX:+ParallelRefProcEnabled \
+            -XX:MaxGCPauseMillis=200 \
+            -XX:+UnlockExperimentalVMOptions \
+            -XX:+DisableExplicitGC \
+            -XX:+AlwaysPreTouch \
+            -XX:G1NewSizePercent=30 \
+            -XX:G1MaxNewSizePercent=40 \
+            -XX:G1HeapRegionSize=8M \
+            -XX:G1ReservePercent=20 \
+            -XX:G1HeapWastePercent=5 \
+            -XX:G1MixedGCCountTarget=4 \
+            -XX:InitiatingHeapOccupancyPercent=15 \
+            -XX:G1MixedGCLiveThresholdPercent=90 \
+            -XX:G1RSetUpdatingPauseTimePercent=5 \
+            -XX:SurvivorRatio=32 \
+            -XX:+PerfDisableSharedMem \
+            -XX:MaxTenuringThreshold=1 \
+            -Daikars.new.flags=true \
+            -Dusing.aikars.flags=https://mcflags.emc.gs"
+
+echo "eula=${EULA:-false}" > eula.txt
+
+if [[ -n $SERVER_MEMORY ]]
+then
+  JAVA_OPTS="-Xms${SERVER_MEMORY} -Xmx${SERVER_MEMORY} $JAVA_OPTS"
+fi
+
+SERVER_PROPERTIES=$SERVER_DIR/server.properties
+SERVER_WHITELIST=$SERVER_DIR/whitelist.json
+SERVER_OPLIST=$SERVER_DIR/ops.json
+WHITELIST_PREP=$SERVER_DIR/whitelist.prep
+OPLIST_PREP=$SERVER_DIR/op.prep
+
+if [ -f $SERVER_PROPERTIES ]; then
+  mv $SERVER_PROPERTIES $SERVER_PROPERTIES.bkp
+  rm $SERVER_PROPERTIES
+  touch $SERVER_PROPERTIES
+fi
+
+if [ -f $WHITELIST_PREP ]; then
+  echo -n "[" > $SERVER_WHITELIST
+  cat $WHITELIST_PREP | while read u
+  do
+    echo "Adding $u to whitelist"
+
+    # get uuid of user
+    uuid=$(curl -s https://api.mojang.com/users/profiles/minecraft/$u | jq -r '.id')
+    uuid=$(echo "${uuid:0:8}-${uuid:8:4}-${uuid:12:4}-${uuid:16:4}-${uuid:20:12}")
+
+
+    if [[ $uuid == "null" ]]; then
+      echo "User $u not found. Skipping."
+      continue
+    fi
+
+    # write to whitelist.json
+    echo -n "{\"uuid\": \"$uuid\",\"name\": \"$u\"}" >> $SERVER_WHITELIST;
+
+  done
+  echo "]" >> $SERVER_WHITELIST
+  sed --in-place -e 's/}{/}, {/g' $SERVER_WHITELIST
+fi
+
+if [ -f $OPLIST_PREP ]; then
+  echo -n "[" > $SERVER_OPLIST
+  cat $OPLIST_PREP | while read u
+  do
+    echo "Adding $u to ops"
+
+    # get uuid of user
+    uuid=$(curl -s https://api.mojang.com/users/profiles/minecraft/$u | jq -r '.id')
+    uuid=$(echo "${uuid:0:8}-${uuid:8:4}-${uuid:12:4}-${uuid:16:4}-${uuid:20:12}")
+
+
+    if [[ $uuid == "null" ]]; then
+      echo "User $u not found. Skipping."
+      continue
+    fi
+
+    # write to whitelist.json
+    echo -n "{\"uuid\": \"$uuid\",\"name\": \"$u\",\"level\": 4,\"bypassesPlayerLimit\": false}" >> $SERVER_OPLIST;
+
+  done
+  echo "]" >> $SERVER_OPLIST
+  sed --in-place -e 's/}{/}, {/g' $SERVER_OPLIST
+fi
+
+if [[ -n $WHITELIST ]]; then
+  echo "white-list=$WHITELIST" >> $SERVER_PROPERTIES
+fi
+
+if [[ -n $SEED ]]; then
+  echo "seed=$SEED" >> $SERVER_PROPERTIES
+fi
+
+if [[ -n $MAX_PLAYERS ]]; then
+  echo "max-players=$MAX_PLAYERS" >> $SERVER_PROPERTIES
+fi
+
+if [[ -n $DIFFICULTY ]]; then
+  echo "difficulty=$DIFFICULTY" >> $SERVER_PROPERTIES
+fi
+
+if [[ -n $GAMEMODE ]]; then
+  echo "gamemode=$GAMEMODE" >> $SERVER_PROPERTIES
+fi
+
+if [[ -n $MOTD ]]; then
+  echo "motd=$MOTD" >> $SERVER_PROPERTIES
+fi
+
+if [[ -n $ENFORCE_SECURE_PROFILE ]]; then
+  echo "enforce-secure-profile=$ENFORCE_SECURE_PROFILE" >> $SERVER_PROPERTIES
+fi
+
+# Start server
+if [[ -n $RUNSCRIPT ]]; then
+  exec java $JAVA_OPTS -jar "server.jar" nogui
+else
+  exec bash /home/server/instance/run.sh
+fi