Fix Monolith GCE image to use public debian image (#392)
Fix Monolith GCE image to use public debian image (#392)

Co-authored-by: Megan O'Keefe <b04db65b4589a20a3bb6963e6ecd27813ed97cf8@users.noreply.github.com>
GoogleCloudPlatform/bank-of-anthos,GoogleCloudPlatform/bank-of-anthos,GoogleCloudPlatform/bank-of-anthos,GoogleCloudPlatform/bank-of-anthos