fix(ci): set NODE_ENV=production to fix EXPO_ROUTER_APP_ROOT babel replacement

babel-preset-expo's expo-router plugin skips process.env.EXPO_ROUTER_APP_ROOT
replacement when NODE_ENV=test, causing require.context to receive a variable
instead of a string literal. This results in Metro SyntaxError during bundle.
1 job for main in 2 minutes and 14 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #127729
studio-2023 triggered
ci-build

00:02:14

 
Name Stage Failure
failed
ci-build Build
  output: [ null, null, null ],
pid: 58873,
stdout: null,
stderr: null
}

Node.js v18.18.2
Cleaning up project directory and file based variables
ERROR: Job failed: exit status 1