When I use the docker create command from the readme, the files /arma3/arma3server and /arma3/arma3server_x64 are both missing execute permissions.
My specific docker create command:
docker create \
--name=arma-server \
--restart unless-stopped \
-p 2302:2302/udp \
-p 2303:2303/udp \
-p 2304:2304/udp \
-p 2305:2305/udp \
-p 2306:2306/udp \
-v /home/user/docker/arma3-server/missions:/arma3/server/mpmissions \
-v /home/user/docker/arma3-server/configs:/arma3/server/configs \
-v /home/user/docker/arma3-server/mods:/arma3/server/mods \
-v /home/user/docker/arma3-server/servermods:/arma3/server/servermods \
-e STEAM_USER=steam_user \
-e STEAM_PASSWORD=steam_password \
-e MODS_PRESET="/arma3/server/configs/mods.html" \
ghcr.io/brettmayson/arma3server/arma3server:v2