Updated Dockerfile to include git submodule recursion

Updated the Dockerfile so that the git pull is tag specific and it
includes the submodule inclusion flag. Also updated project to
include s6 and run the server process as a user with dropped rights.

Author: PacketShepard

Dockerfile

@@ -19,8 +19,9 @@ RUN printf "deb http://deb.debian.org/debian buster-backports main\n" > /etc/apt
     libssl-dev \
     git \
     curl \
-    ca-certificates && \
-    git clone --depth 1 --branch master https://github.com/BeamMP/BeamMP-Server.git BeamMP-Server 2>/dev/null
+    ca-certificates
+
+RUN git clone --depth 1 -b v2.0.3 --recurse-submodules --shallow-submodules https://github.com/BeamMP/BeamMP-Server.git BeamMP-Server
 
 WORKDIR /beammp/BeamMP-Server
 
@@ -32,6 +33,9 @@ RUN mkdir /beammp
 
 WORKDIR /beammp
 
+ADD https://github.com/just-containers/s6-overlay/releases/download/v2.2.0.1/s6-overlay-amd64-installer /tmp/
+RUN chmod +x /tmp/s6-overlay-amd64-installer && /tmp/s6-overlay-amd64-installer /
+
 RUN printf "deb http://deb.debian.org/debian buster-backports main\n" > /etc/apt/sources.list.d/buster-backports.list && \
     apt-get update && apt-get install -y --no-install-recommends \
     liblua5.3 \

README.md

@@ -4,7 +4,8 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/packetshepard/beammp.svg)][hub]
 
 # [BeamMP-Server in docker][hub]
-BeamMP-Server Auto Builder using Docker with Multi-image Debian 10
+BeamMP-Server Auto Builder using Docker with multi-image Debian 10
+
 Lightweight final image. Approximately 187 MB.
 
 ## Usage

entrypoint.sh

@@ -14,4 +14,15 @@ use = "${use}" # Resource file name
 AuthKey = "${AuthKey}" # Auth Key
 EOF
 
-exec ./BeamMP-Server
+USER_NAME=${USER_NAME:-beammp}
+
+PUID=${PUID:-811}
+PGID=${PGID:-811}
+
+useradd -M -r -s /usr/sbin/nologin "$USER_NAME"
+groupmod -o -g "$PGID" "$USER_NAME"
+usermod -o -u "$PUID" "$USER_NAME"
+
+chown "$USER_NAME":"$USER_NAME" /beammp
+
+exec s6-setuidgid ${USER_NAME} ./BeamMP-Server