Due to the per-project custom CA Certificate required to connect to digitalocean managed databases, it's difficult to setup app platform with digitalocean managed databases, often requiring code in the run step instruction such as:

echo -e "$DATABASE_CA_CERTIFICATE" > ./digitalocean-ca-certs.pem && NODE_EXTRA_CA_CERTS=./digitalocean-ca-certs.pem node bin/server.js

Contrast this with Amazon where you can just download a single certificate bundle that covers all regions for all AWS RDS instances.