feat: add option to enable developer mode

Author: dgibbs64

Diff for: Dockerfile.ubuntu-1804

@@ -16,6 +16,7 @@ ENV LGSM_LOGDIR=/data/log
 ENV LGSM_SERVERFILES=/data/serverfiles
 ENV LGSM_DATADIR=/data/data
 ENV LGSM_CONFIG=/data/config-lgsm
+ENV LGSM_DEV=false
 ENV GAMESERVER=jc2server
 ENV UPDATE_CHECK=60
 ENV USER=linuxgsm

Diff for: Dockerfile.ubuntu-2004

@@ -16,6 +16,7 @@ ENV LGSM_LOGDIR=/data/log
 ENV LGSM_SERVERFILES=/data/serverfiles
 ENV LGSM_DATADIR=/data/data
 ENV LGSM_CONFIG=/data/config-lgsm
+ENV LGSM_DEV=false
 ENV GAMESERVER=jc2server
 ENV UPDATE_CHECK=60
 ENV USER=linuxgsm

Diff for: Dockerfile.ubuntu-2204

@@ -16,6 +16,7 @@ ENV LGSM_LOGDIR=/data/log
 ENV LGSM_SERVERFILES=/data/serverfiles
 ENV LGSM_DATADIR=/data/data
 ENV LGSM_CONFIG=/data/config-lgsm
+ENV LGSM_DEV=false
 ENV GAMESERVER=jc2server
 ENV UPDATE_CHECK=60
 ENV USER=linuxgsm

Diff for: entrypoint-user.sh

@@ -30,6 +30,12 @@ elif [ -d "/app/lgsm/modules" ]; then
   chmod +x /app/lgsm/modules/*
 fi
 
+# Enable developer mode
+if [ "${LGSM_DEV}" == "true" ]; then
+  echo -e "developer mode enabled"
+  ./"${GAMESERVER}" developer
+fi
+
 # Install game server
 if [ -z "$(ls -A -- "/data/serverfiles" 2> /dev/null)" ]; then
   echo -e ""