Access app files in ssh session into google app engine flexible?

[Dhiraj Gupta via StackOverflow]

I'm setting up a PHP based Google App Engine Flexible Environment project and it would be much easier going for me (in terms of speed of progress) if I could access the PHP files that are running at /app in the SSH session that the Google Cloud Console so gracefully provides right in the web browser.

Unfortunately, there is no information that I can find pertaining to this. I can see the output of the mount command and it looks like a whole lot of paths are mounted, but none give a clue where my /app can be found:

sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,relatime,size=10240k,nr_inodes=191984,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=154052k,mode=755)
/dev/sda1 on / type ext4 (rw,relatime,data=ordered)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=308100k)
rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
cgroup on /sys/fs/cgroup type tmpfs (rw,relatime,mode=755)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,relatime,cpuset)
cgroup on /sys/fs/cgroup/cpu type cgroup (rw,relatime,cpu)
cgroup on /sys/fs/cgroup/cpuacct type cgroup (rw,relatime,cpuacct)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,relatime,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer)
cgroup on /sys/fs/cgroup/net_cls type cgroup (rw,relatime,net_cls)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,relatime,blkio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,relatime,perf_event)
cgroup on /sys/fs/cgroup/net_prio type cgroup (rw,relatime,net_prio)
/dev/sda1 on /var/lib/docker/aufs type ext4 (rw,relatime,data=ordered)
none on /var/lib/docker/aufs/mnt/a8141f5169b6d62d3baeb5d0da713cdf77a2a5524ba492a579a8af9963f2aba4 type aufs (rw,relatime,si=5f839818bd3efaaa,dio,dirperm1)
shm on /var/lib/docker/containers/11aafe10a4269e66ffef7b09dd07d0793e1793bf17a287311e9cdc26bca39a25/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k)
proc on /run/docker/netns/b3fa6a6ae075 type proc (rw,nosuid,nodev,noexec,relatime)
none on /var/lib/docker/aufs/mnt/5b5758049ca6d6c65eddcffcc1d18be01d5337a0ccd27b9f7a80d417495ccf95 type aufs (rw,relatime,si=5f839818a368baaa,dio,dirperm1)
shm on /var/lib/docker/containers/08ba8f0c4ba4a1373f5c6723f4ed2b76c88994a9b5ef3f47dc100b833f39233d/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k)
proc on /run/docker/netns/b94901bac194 type proc (rw,nosuid,nodev,noexec,relatime)
none on /var/lib/docker/aufs/mnt/6fee2ea01a6311aaf32767351e2635e03d20c2bcdff3034bdf8145e672f1ab3e type aufs (rw,relatime,si=5f839818a32d5aaa,dio,dirperm1)
shm on /var/lib/docker/containers/8d81f94a6c7381323b8f8fb86fbc4546db03bdbc68cc537a0684be32773f921e/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k)
proc on /run/docker/netns/db581b9dfbd7 type proc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /mnt/app_volumes/mnt/ramdisk1 type tmpfs (rw,relatime,size=104448k)
none on /var/lib/docker/aufs/mnt/cd6c2ddbddf1a871e9e5da6b7ebe2515da0002829aca2fb9eb598b48c3c4ad8f type aufs (rw,relatime,si=5f839818a0d6baaa,dio,dirperm1)
shm on /var/lib/docker/containers/a16282fee594fc5d38ef3185b8442f15f16d2f496f49a5748536067ac3826840/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k)
proc on /run/docker/netns/f14af5f2d130 type proc (rw,nosuid,nodev,noexec,relatime)
none on /var/lib/docker/aufs/mnt/bf58f8c8520fb2113364cbd31709159c36f09bceff53239cd42e238ed53fd357 type aufs (rw,relatime,si=5f839818b97b5aaa,dio,dirperm1)
shm on /var/lib/docker/containers/e778b3781b6a8f4ab53bb925a9cd196da258c6e95c74c22eed029b2b3e4c7955/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k)
proc on /run/docker/netns/19a91926e87f type proc (rw,nosuid,nodev,noexec,relatime)

It looks like docker is in use to run my app, but I am unable to list containers, this is what I get back using $docker ps Cannot connect to the Docker daemon. Is the docker daemon running on this host?

Suggestions, pointers would be much appreciated!

Please DO NOT REPLY directly to this email but go to StackOverflow:
http://stackoverflow.com/questions/44022421/access-app-files-in-ssh-session-into-google-app-engine-flexible