OSError: [Errno 28] No space left on device on docker-compose build step about pwnadventure3 HOT 2 OPEN

$ docker-compose build
master uses an image, skipping
game uses an image, skipping
Building init
Traceback (most recent call last):
  File "site-packages/docker/utils/build.py", line 97, in create_archive
  File "tarfile.py", line 1972, in addfile
  File "tarfile.py", line 250, in copyfileobj
  File "tempfile.py", line 481, in func_wrapper
OSError: [Errno 28] No space left on device
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "bin/docker-compose", line 6, in <module>
  File "compose/cli/main.py", line 72, in main
  File "compose/cli/main.py", line 128, in perform_command
  File "compose/cli/main.py", line 303, in build
  File "compose/project.py", line 403, in build
  File "compose/project.py", line 385, in build_service
  File "compose/service.py", line 1106, in build
  File "site-packages/docker/api/build.py", line 160, in build
  File "site-packages/docker/utils/build.py", line 31, in tar
  File "site-packages/docker/utils/build.py", line 100, in create_archive
OSError: Can not read file in context: /home/pwn/PwnAdventure3/client/PwnAdventure3_Data/PwnAdventure3/PwnAdventure3/Binaries/Linux/PwnAdventure3Server
[1520] Failed to execute script docker-compose

$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            2.9G     0  2.9G   0% /dev
tmpfs           597M 1008K  596M   1% /run
/dev/sda2       9.8G  9.2G  139M  99% /
tmpfs           7.0G     0  7.0G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           7.0G     0  7.0G   0% /sys/fs/cgroup
shared          466G  452G   14G  98% /home/pwn/shared
/dev/loop0       90M   90M     0 100% /snap/core/8268
/dev/loop1       94M   94M     0 100% /snap/core/9066
tmpfs           597M     0  597M   0% /run/user/1000