I added countryblock to block entire countries, and I also added a watchtower container as suggested by this comment, thanks ldw. Update June 2020 I added fail2ban to block brute-force attacks on the webvault and country-wide blocking to avoid egress charges to China and Australia, or to block other countries that you might want. Update July 2020 I added a new script and section for rebooting the host vm when updates have been made to the OS, ensuring that the host system stays patched and secure against n-day vulnerabilities. Update May 2021 I implemented a backup solution, check out Configure Bitwarden Backups for details. The readme.md found in that repo should be enough to get going if you’re not new to projects like this, whereas the text below has a bit more detail if you need it. The end product is a Github repo (link below). In this guide I talk about best practices in avoiding this kind of traffic to keep this as free as possible.

*The only way this might not be free is if you exceed the 1GB egress or have any egress to China or Australia. Following these instructions, you should have a product that provides you a self-hosted Bitwarden password manager with all the benefits of running it in the cloud. This write-up is a product of my quest to self-host Bitwarden on a free-tier cloud product. Step 3: Start Services with docker-compose.Configure Automatic Rebooting After Updates (optional).Configure Country-wide Blocking (optional).Guide: Self-host Bitwarden on Google Cloud for Free*

Docker bitwarden server