fix: increase tmpfs from 4G to 8G to accommodate node_modules + BuildKit cache during push

The frontend Docker build with pre-installed node_modules (~200MB) plus
BuildKit layer exports during GHCR push exceeds the 4G tmpfs limit.
Increasing to 8G provides headroom for large builds with registry pushes.

Author: manascb1344

app.py

@@ -176,7 +176,7 @@ def _get_gpu_config(gpu_key: str):
 # gVisor requires tmpfs for Docker overlay2 storage driver.
 # Without this, Docker falls back to the vfs driver (10-50x slower).
 mkdir -p /var/lib/docker
-mount -t tmpfs -o size=4G tmpfs /var/lib/docker
+mount -t tmpfs -o size=8G tmpfs /var/lib/docker
 
 exec /usr/bin/dockerd --iptables=false --ip6tables=false > /var/log/dockerd.log 2>&1
 """