Edit: Attention, a different solution has been written since the writing of this page, but the information here remains valid:

• I install Vaultwarden (Bitwarden) on my Synology NAS

I chose KeepassXC + Keepass2Android with Yubikey authentication

My specifications

• Choose a free and secure password manager (even better certified ANSSI)
• Allow to share a password change instantly on all my devices, smartphone included, avoid file replications
• Don't use proprietary (non-open source) solutions that could host my data somewhere in the world
• Do not have a super strong opening password of 30 special characters to be typed 5 times a day
• Secure database opening via a single Yubikey on all devices
• If the Yubikey is lost or broken, have a backup solution
• That the user in the browser is no login or password to enter and even better, that the dual authentication based on TOTP (time-based single-use password) is calculated and completed on the same principle.
• That new login/passwords are added to the database easily and updates detected and corrected in the database.

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