Pod environment variables

You can store the following environment variables in your Pods.

Variable	Description
`RUNPOD_POD_ID`	The unique identifier for your pod.
`RUNPOD_API_KEY`	Used to make Runpod API calls to the specific pod. It’s limited in scope to only the pod.
`RUNPOD_POD_HOSTNAME`	Name of the host server the pod is running on.
`RUNPOD_GPU_COUNT`	Number of GPUs available to the pod.
`RUNPOD_CPU_COUNT`	Number of CPUs available to the pod.
`RUNPOD_PUBLIC_IP`	If available, the publicly accessible IP for the pod.
`RUNPOD_TCP_PORT_22`	The public port SSH port 22.
`RUNPOD_ALLOW_IP`	You can whitelist specific IPs to access your pod, like 192.168.0.12/32, 172.16.0.16/32.
`RUNPOD_DC_ID`	The data center where the pod is located.
`RUNPOD_VOLUME_ID`	The ID of the volume connected to the pod.
`CUDA_VERSION`	The installed CUDA version.
`PWD`	Current working directory.
`PYTORCH_VERSION`	Installed PyTorch Version.
`PUBLIC_KEY`	The SSH public keys to access the pod over SSH.