I have a container with the following spec:

containers:
      - name: test-container
        image: REDACTED
        env:
        - name: DISPLAY
          value: ":10.0"   <---------------------
        - name: NODE_ENV
          value: "production"
        - name: ENDPOINT
          value: REDACTED
        ports:
        - containerPort: 8080
        volumeMounts:
        - name: x11
          mountPath: /tmp/.X11-unix
      volumes:
      - name: x11
        hostPath:
          path: /tmp/.X11-unix

sidenote: What this is doing is it's allowing me to render components on the host node, but perform the computation inside my container.

Right now I have DISPLAY hardcoded to ":10.0", but I want to do something like:

env:
        - name: DISPLAY
          value: ":$HOST_DISPLAY"

Which will mount the host node's DISPLAY variable (rather than hardcoding and guessing what it will be), so that if a node has ":0" or any other variable set it will forward/inject it into the container dynamically.

Any way to accomplish this? If it helps I can use an ansible operator

Edit to further explain:

Imagine a pod that was a simple http server that when you hit it with a browser, showed you the operating system of the node it is being run on. Lets say the node had an environment variable called OPERATING_SYSTEM. Node A has OPERATING_SYSTEM=Windows Node B has OPERATING_SYSTEM=Linux. How could I configure this pod to display the node's operating system. NOT THE CONTAINER OPERATING SYSTEM

Another example:

Imagine a pod that was a simple http server that when you hit it with a browser, it gave you back the ID of the node that it is running on. Lets say Node 1 has an environment variable called NODE_ID=123 and Node 2 has an environment variable called NODE_ID=456. When any pod gets scheduled on one of these two arbitrary nodes, it can access these NODE environment variables to correctly display which node it's running on

I almost want to do this, except with node.fields: https://v1-15.docs.kubernetes.io/docs/tasks/inject-data-application/environment-variable-expose-pod-information/