build 🔧 Improve logging with colors!

Dockerfile

@@ -2,7 +2,7 @@ FROM ubuntu:18.04
 
 ARG GAME
 
-RUN if [ -z "$GAME" ]; then echo "Error: The GAME environment variable is not set, specify one and try again. Please refer to the README for instructions: https://github.com/JamesIves/hlds-docker" && exit 1; fi
+RUN if [ -z "$GAME" ]; then printf "\033[31mError: The GAME environment variable is not set, specify one and try again. Please refer to the README for instructions: https://github.com/JamesIves/hlds-docker\033[0m\n" && exit 1; fi
 
 RUN dpkg --add-architecture i386 && \
     apt-get update && \

entrypoint.sh

@@ -1,19 +1,19 @@
 #!/usr/bin/env sh
 
 if [ -z "$GAME" ]; then 
-  echo "Error: The GAME environment variable is not set, please refer to the README for instructions: https://github.com/JamesIves/hlds-docker"
+  echo -e "\e[31mError: The GAME environment variable is not set, please refer to the README for instructions: https://github.com/JamesIves/hlds-docker\e[0m"
   exit 1
 fi
 
-if [[ "$@" != *"+map"* ]]; then
-  echo "Warning: No +map specified in the command. Server will start but may not be joinable."
+if echo "$@" | grep -qv "+map"; then
+  echo -e "\e[33mWarning: No +map specified in the command. Server will start but may not be joinable.\e[0m"
 fi
 
 if [ -d /temp/hlds ]
 then
   rsync --chown=steam:steam /temp/hlds/* /opt/steam/hlds/$GAME
 fi
 
-echo Starting Half-Life Dedicated Server...
+echo -e "\e[32mStarting Half-Life Dedicated Server...\e[0m"
 
 ./hlds_run "-game $GAME $@"