convert to "rootless"

Dockerfile

@@ -1,32 +1,36 @@
 FROM ubuntu:noble
 
+ARG UID=1000
+ARG GID=1000
+
 ENV DEBIAN_FRONTEND=noninteractive
 
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
 # install prerequisites
-RUN apt update \
-    && apt install -y --no-install-recommends \
-    curl ca-certificates \
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends \
+  curl \
+  ca-certificates \
   jq \
   libxml2-utils \
-    && apt autoremove \
-    && apt clean \
-    && rm -rf /var/lib/apt/lists/*
+  sudo && \
+  apt-get autoremove && apt-get clean && \
+  rm -rf /var/lib/apt/lists/*
 
 # Remove default ubuntu user
-RUN userdel -r ubuntu \
-    && useradd --create-home -u 1000 minecraft \
-    && mkdir -p /data \
-    && chown -R 1000:1000 /data
+RUN userdel -r ubuntu && \
+  useradd --create-home -u 1000 minecraft && \
+  echo 'minecraft ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers && \
+  mkdir -p /data && \
+  chown -R ${UID}:${GID} /data
 
-USER minecraft
-
-RUN curl -sL https://github.com/Jabba-Team/jabba/raw/main/install.sh | bash \
-    && . ~/.jabba/jabba.sh
-
-USER root
+RUN su -c "curl -sL https://github.com/Jabba-Team/jabba/raw/main/install.sh | bash && . ~/.jabba/jabba.sh" minecraft
 
 COPY ./scripts/init /
 COPY ./scripts/mc /usr/local/bin 
 RUN chmod +x /init && chmod +x /usr/local/bin/mc
 
+USER minecraft
+
 CMD ["/init"]

scripts/init

@@ -5,12 +5,14 @@ PGID="${PGID:-1000}"
 
 setperms() {
   echo "Setting permissions to UID:${PUID} and GID:${PGID}"
-    usermod -u ${PUID} minecraft > /dev/null 2>&1
-    groupmod -g ${PGID} minecraft > /dev/null 2>&1
-    chown -R ${PUID}:${PGID} /data > /dev/null 2>&1
+  sudo usermod -u ${PUID} minecraft >/dev/null 2>&1
+  sudo groupmod -g ${PGID} minecraft >/dev/null 2>&1
+  sudo chown -R ${PUID}:${PGID} /data >/dev/null 2>&1
+  echo "DONE"
   sleep 2
 }
 
 setperms
 
-su -c "mc" minecraft
+mc
+

scripts/mc

@@ -1,14 +1,14 @@
 #!/bin/env bash
 
-MC_LOADER="${MC_LOADER:="paper"}"
-MC_VERSION=${MC_VERSION:="1.21.4"}
+MC_LOADER="${MC_LOADER:-"paper"}"
+MC_VERSION=${MC_VERSION:-"1.21.4"}
 
-JAVA_VERSION=${JAVA_VERSION:="temurin@21"}
-JAR=${JAR:="server.jar"}
-MEM=${MEMORY:=2G}
-ADD_ARGS=${ADD_ARGS:=""}
+JAVA_VERSION=${JAVA_VERSION:-"temurin@21"}
+JAR=${JAR:-"server.jar"}
+MEM=${MEMORY:-2G}
+ADD_ARGS=${ADD_ARGS:-""}
 
-RESTART=${RESTART:="true"}
+RESTART=${RESTART:-"true"}
 
 crash() {
   sleep 5