Google Cloud SDK (gcloud) Installation

Visit the Google Cloud SDK installation page: https://cloud.google.com/sdk/docs/install. Follow the installation instructions specific to your operating system.
Run the following command to verify that the SDK installed correctly: gcloud version
Run the following command to start the initialization process: gcloud init
Authenticate with Application Default Credentials: gcloud auth application-default login
After initialization, run: gcloud config set project YOUR_PROJECT_ID (Replace YOUR_PROJECT_ID with your actual GCP project ID)

express-cli on GCP

Make sure you have installed gcloud tool for authentication
You also need ssh-keygen tool. It's mostly available in all distributions.
You should have a public and private keypair for running ssh commands. You can generate one using following commands sh ssh-keygen -f ~/ubuntu.pem -N "" The above command will generates the public key named ubuntu.pem.pub and the private key named ubuntu.pem in home directory.
In .env file, you have update with correct details. You can ignore AWS specific terraform variables.

If you don't have a keypair, run the following command to generate an SSH key pair: ssh-keygen -f ubuntu.pem -N ""
The above command generates two files. ubuntu.pem (private keyfile) and ubuntu.pem.pub (public key)
These two files have to be updated in .env file.
Locate the TF_VAR_GCP_PUB_KEY_FILE variable in .env file and set its value to the absolute path pointing to the public key file you generated.
Locate the PEM_FILE_PATH variable in .env file and set its value to the absolute path pointing to the private key file you generated.

GCP identifies the resources using names. So every resource should have a unique name.
When deploying resources in GCP, we are using TF_VAR_VM_NAME names as prefix for each resource to ensure uniqueness and avoid conflicts.
So for every devnet you provision, make sure to update the TF_VAR_VM_NAME in .env.