docs: improve comments in DockerFile to explain whats going on better

container/Dockerfile

@@ -2,12 +2,12 @@ FROM ubuntu:18.04
 
 # Sets an environment variable for the game to install.
 # Supported games: valve, cstrike, czero, dod, dmc, gearbox, ricochet, tfc
-# Default is valve. This get replaced when building the image with --build-arg GAME=<game>
+# Default is valve. This gets replaced when building the image with --build-arg GAME=<game>
 ARG GAME=valve
 ENV GAME ${GAME}
 
 # Sets an environment variable for any additional flag that should be passed to the SteamCMD installer.
-# Default is an empty string. This get replaced when building the image with --build-arg FLAG=<FLAG>
+# Default is an empty string. This gets replaced when building the image with --build-arg FLAG=<FLAG>
 # For example, you may set this to "-beta steam_legacy".
 ARG FLAG
 ENV FLAG ${FLAG}
@@ -31,27 +31,33 @@ LABEL org.opencontainers.image.documentation="https://github.com/jamesives/hlds-
 LABEL org.opencontainers.image.source="https://github.com/jamesives/hlds-docker"
 LABEL org.opencontainers.image.version="${VERSION}"
 
+# Installs the necessary dependencies for the SteamCMD installer.
 RUN dpkg --add-architecture i386 && \
     apt-get update && \
     apt-get install -y --no-install-recommends curl rsync file libc6:i386 lib32stdc++6 ca-certificates && \
     rm -rf /var/lib/apt/lists/*
 
+# Creates a new user and group for the SteamCMD installer.
 RUN groupadd -r steam && \
     useradd -r -g steam -m -d /opt/steam steam
 
+# Creates the necessary directories for the Half-Life Dedicated Server.
 RUN mkdir /config
 RUN mkdir /mods
 
+# Sets the user to the steam user.
 USER steam
 WORKDIR /opt/steam
 
+# Copies the hlds.txt file to the container.
 COPY ./hlds.txt /opt/steam
 
 # Replaces $GAME with the requested mod to install in hlds.txt.
-# Additionally replaces $FLAG with any additional FLAG that should be passed to the SteamCMD installer to support betas.
+# Additionally replaces $FLAG with any additional flags that should be passed to the SteamCMD installer to support betas.
 RUN sed -i "s/\$GAME/${GAME}/g" /opt/steam/hlds.txt
 RUN sed -i "s/\$FLAG/${FLAG}/g" /opt/steam/hlds.txt
 
+# Downloads and extracts the SteamCMD installer.
 RUN curl -v -sL media.steampowered.com/client/installer/steamcmd_linux.tar.gz | tar xzvf - && \
     file /opt/steam/linux32/steamcmd && \
     ./steamcmd.sh +runscript /opt/steam/hlds.txt
@@ -62,12 +68,15 @@ RUN mkdir -p $HOME/.steam \
     && ln -s /opt/steam/linux32 $HOME/.steam/sdk32 \
     && echo 70 > /opt/steam/hlds/steam_appid.txt
 
+
 WORKDIR /opt/steam/hlds
 
+# Copies the entrypoint script to the container and sets the necessary permissions.
 COPY --chown=steam:steam ./entrypoint.sh ./entrypoint.sh
 COPY --chown=steam:steam config $GAME
 COPY --chown=steam:steam mods .
 
+# Sets the entrypoint script as executable.
 RUN chmod +x ./entrypoint.sh