GPII-3641: Change couchdb_init to alpine.
GPII-3641: Change couchdb_init to alpine.

busybox is not supported by GCR Security Scan.

mrtyler/gpii-terraform,mrtyler/gpii-infra,mrtyler/gpii-terraform,mrtyler/gpii-infra,mrtyler/gpii-infra,mrtyler/gpii-terraform,mrtyler/gpii-infra