The decline of Heroku is a shame, they were the first to really make cloud accessible to all.
Over at Northflank (https://northflank.com), we're trying to continue that trend and great developer experience is our main priority. We address many of the same points you mention - simply `git push` to build and deploy (using Dockerfiles or Buildpacks), instant free DNS & TLS, one-click addons (Postgres, Mongo, Redis...), environment variables inherited from databases, and much much more - all with sensible pricing.
Over at Northflank (https://northflank.com), we're trying to continue that trend and great developer experience is our main priority. We address many of the same points you mention - simply `git push` to build and deploy (using Dockerfiles or Buildpacks), instant free DNS & TLS, one-click addons (Postgres, Mongo, Redis...), environment variables inherited from databases, and much much more - all with sensible pricing.
Feel free to check out what we've been building at https://northflank.com/changelog