fix: hold gamedig at 4.3.1 for ubuntu 18.04

Author: dgibbs64

Dockerfile.ubuntu-2204

@@ -91,9 +91,6 @@ RUN echo "**** Install Node.js ****" \
 # Install GameDig https://docs.linuxgsm.com/requirements/gamedig
 RUN echo "**** Install GameDig ****" \
   && npm install -g gamedig@4.3.1
-WORKDIR /app/lgsm \
-  wget -N --no-check-certificate "https://raw.githubusercontent.com/GameServerManagers/LinuxGSM/${LGSM_GITHUBBRANCH}/package.json" \
-  && npm install
 
 WORKDIR /app