Dockerfile

@@ -80,13 +80,23 @@ RUN mkdir -p ${DATA_PATH}/Chunky/tasks && \
 # Generate unicode locale so that cyrillic characters display properly
 RUN apt-get update -y && apt-get install -y locales && \
     echo en_US.UTF-8 UTF-8 > /etc/locale.gen && \
-    dpkg-reconfigure --frontend=noninteractive locales
+    dpkg-reconfigure --frontend=noninteractive locales && \
+    rm -Rf var/lib/apt/lists/*
 ENV LANG en_US.UTF-8
 
 
 VOLUME ${DATA_PATH}
 
 
+# Minecraft
+EXPOSE 25565/tcp
+# BlueMap
+EXPOSE 8100/tcp 
+
+
+ENV GID=988
+ENV UID=999
+
 ENV MEMORY=4G
 ENV PROXY_SECRET=00000000-0000-0000-0000-000000000000
 
@@ -130,14 +140,17 @@ ENV DISCORDSRV_DB_NAME=discordsrv_db
 ENV DISCORDSRV_DB_USERNAME=discordsrv
 ENV DISCORDSRV_DB_PASSWORD=0000
 
+
 WORKDIR ${WORKDIR_PATH}/config
 
-# Minecraft
-EXPOSE 25565/tcp
-# BlueMap
-EXPOSE 8100/tcp 
-
 CMD \
+    # Create and switch to user with desired UID and GID.
+    # All processes that create/change files in ${DATA_PATH}
+    # must be run under this user.
+    groupadd -g ${GID} worker && \
+    useradd -M -g ${GID} -u ${UID} worker && \
+    chmod -R o-rwx ${WORKDIR_PATH} && \
+
     # Add proxy secret
     sed -i "s/_PROXY_SECRET_/${PROXY_SECRET}/g" config/paper-global.yml && \
 
@@ -189,5 +202,8 @@ CMD \
     sed -i "s/_DISCORDSRV_DB_USERNAME_/${DISCORDSRV_DB_USERNAME}/g" plugins/DiscordSRV/config.yml && \
     sed -i "s/_DISCORDSRV_DB_PASSWORD_/${DISCORDSRV_DB_PASSWORD}/g" plugins/DiscordSRV/config.yml && \
 
+    # Change UID and GID of used files to desired values.
+    chown -R worker:worker ${WORKDIR_PATH} && \
+
     # Launch
-    java -Xms${MEMORY} -Xmx${MEMORY} -jar *.jar -nogui
+    su worker -c "java -Xms${MEMORY} -Xmx${MEMORY} -jar *.jar -nogui"