Bot Docker: how-to-run steps & parameterize Dockerfile (#12761)

game-app/game-headless/Dockerfile

@@ -3,12 +3,20 @@ FROM openjdk:11-jre-slim-buster
 EXPOSE 4000
 ENV BOT_NAME=BotDocker01
 ENV LOBBY_URI=http://localhost:3000
-RUN mkdir /downloadedMaps
+ENV BOT_MAX_MEMORY="256M"
+ENV BOT_XSS="1250k"
+
 ENV MAPS_FOLDER=/downloadedMaps
+ENV EXIT_ON_GAME_END=FALSE
+
+RUN mkdir $MAPS_FOLDER
 
 ADD build/libs/triplea-game-headless.jar /
 CMD java \
+   -Xmx$BOT_MAX_MEMORY \
+   -Xss$BOT_XSS \
    -Dtriplea.name=$BOT_NAME \
    -Dtriplea.port=4000 \
    -Dtriplea.lobby.uri=$LOBBY_URI \
+   -Dtriplea.exit.on.game.end=$EXIT_ON_GAME_END \
    -jar triplea-game-headless.jar

game-app/game-headless/README.md

@@ -46,3 +46,25 @@ cd work/triplea/triplea/game-app/game-headless/
 
 Start Triplea-Game, in 'settings' > 'testing', update Lobby URI to be: `http://localhost:3000`,
 'save' & then connect to lobby via 'play online'.
+
+
+### Running bots (on prod)
+
+
+### Linux:
+
+Below script opens firewall port 4000, downloads latest bot image & starts it.
+
+```bash
+BOT_NAME=....change_me.....
+
+sudo ufw allow 4000
+docker pull ghcr.io/triplea-game/bot:latest
+MAPS_FOLDER=/home/$USER/triplea/downloadedMaps
+docker run \
+    --env BOT_NAME=$BOT_NAME \
+    --env LOBBY_URI=https://prod.triplea-game.org \
+    -v $MAPS_FOLDER:/downloadedMaps \
+    -p 4000:4000 \
+    ghcr.io/triplea-game/bot:latest
+```