Verify Airnode `v0.11` uses node `v18`

[wkande]

@aTeoke This is to look into your request.

[dcroote]

Yes: https://github.com/api3dao/airnode/pull/1647

[dcroote]

Or wait- do you mean environment in processing specifications of config.json?

[wkande]

@dcroote @aTeoke - So Airnode uses node 18, but I thought that the environment field for pre/post processing was user defined. So why can't it be whatever node version they want?

[dcroote]

environment is restricted to two values here: https://github.com/api3dao/ois/blob/59b3dc3f53e45a8e700b340d3af0c0db64a9fade/src/ois.ts#L273

[dcroote]

Closing after our discussion related to https://github.com/api3dao/api3-docs/pull/1207