fastlane_testflight: issue in build script

[ushmau5]

Hey,

Just want to say this is the only guide that worked for me, this entire process has been painful in general.

Needed to use a newer version of Ruby and install the iOS gems or fastlane was not found.

     - uses: ruby/setup-ruby@v1
        with:
          ruby-version: 2.7.2
          bundler-cache: true
      
      - name: Setup Fastlane
        run: |
          cd ios
          bundle install
          cd ..

I needed to change this slightly as we were already in the iOS folder.

      - name: Setup dependencies
        run: |
          yarn
          cd ios
          pod install
          pwd
          echo "${{ secrets.P8_AUTH_KEY }}" > ./FastlaneDeploymentCI.p8