Add tini to java 21 Dockerfile

java/21/Dockerfile

@@ -6,18 +6,19 @@ LABEL       org.opencontainers.image.source="https://github.com/pterodactyl/yolk
 LABEL       org.opencontainers.image.licenses=MIT
 
 RUN         apt update -y \
-			&& apt install -y \
+            && apt install -y \
-					curl \
+                curl \
-					lsof \
+                lsof \
-					ca-certificates \
+                ca-certificates \
-					openssl \
+                openssl \
-					git \
+                git \
-					tar \
+                tar \
-					sqlite3 \
+                sqlite3 \
-					fontconfig \
+                fontconfig \
-					tzdata \
+                tzdata \
-					iproute2 \
+                iproute2 \
-					libfreetype6
+                libfreetype6 \
+                tini
 
 ## Setup user and working directory
 RUN         useradd -m -d /home/container -s /bin/bash container
@@ -25,5 +26,9 @@ USER        container
 ENV         USER=container HOME=/home/container
 WORKDIR     /home/container
 
-COPY        ./../entrypoint.sh /entrypoint.sh
+STOPSIGNAL SIGINT
-CMD         [ "/bin/bash", "/entrypoint.sh" ]
+
+COPY        --chown=container:container ./../entrypoint.sh /entrypoint.sh
+RUN         chmod +x /entrypoint.sh
+ENTRYPOINT    ["/usr/bin/tini", "-g", "--"]
+CMD         ["/entrypoint.sh"]