chore(nodejs): exit installation if Node.js version is unsupported

[sanderblue]

No description provided.

[stevula]

I tested this on an EC2 instance with node 14 and 16 managed via nvm and a test app running via pm2. I locally compiled newrelic-cli using the code from this branch and ran the following install script:

curl -Ls https://download.newrelic.com/install/newrelic-cli/scripts/install.sh | bash && sudo NEW_RELIC_API_KEY=NRAK-**** NEW_RELIC_ACCOUNT_ID=**** NEW_RELIC_CLI_SKIP_CORE=1 ./newrelic install -n node-agent-installer --debug

Node 14

Expected behavior:
Script should fail with error "Node.js version not supported [...]"

Actual behavior:
🔴 Script shows node agent as "Installed" but the entity does not show up in NR UI under All Entities view.
🔴 Debug output shows errors in the preInstall commands:

DEBUG "node": executable file not found in $PATH
DEBUG "node": executable file not found in $PATH
DEBUG 7:4: not a valid test operator: 16
DEBUG 7:4: not a valid test operator: 16
DEBUG 7:4: 16 must be followed by a word
DEBUG 7:4: 16 must be followed by a word

Node 16

Expected behavior:
Script should show Node agent as installed

Actual Behavior:
✅ Script shows Node agent as installed.
🟡 Debug output shows errors in the preInstall commands (same as above).

---

A possible problem here is that the install script is run with sudo and node/nvm might not be on the secure path.

[sanderblue]

I tested this on an EC2 instance with node 14 and 16 managed via nvm and a test app running via pm2. I locally compiled newrelic-cli using the code from this branch and ran the following install script:

curl -Ls https://download.newrelic.com/install/newrelic-cli/scripts/install.sh | bash && sudo NEW_RELIC_API_KEY=NRAK-**** NEW_RELIC_ACCOUNT_ID=**** NEW_RELIC_CLI_SKIP_CORE=1 ./newrelic install -n node-agent-installer --debug

Node 14

Expected behavior: Script should fail with error "Node.js version not supported [...]"

Actual behavior: 🔴 Script shows node agent as "Installed" but the entity does not show up in NR UI under All Entities view. 🔴 Debug output shows errors in the preInstall commands:

DEBUG "node": executable file not found in $PATH
DEBUG "node": executable file not found in $PATH
DEBUG 7:4: not a valid test operator: 16
DEBUG 7:4: not a valid test operator: 16
DEBUG 7:4: 16 must be followed by a word
DEBUG 7:4: 16 must be followed by a word

Node 16

Expected behavior: Script should show Node agent as installed

Actual Behavior: ✅ Script shows Node agent as installed. 🟡 Debug output shows errors in the preInstall commands (same as above).

A possible problem here is that the install script is run with sudo and node/nvm might not be on the secure path.

Should be working now after my recent changes. Let me know if you run into anymore issues. Thanks!

Confirm this is working to the extent it can and is low risk.