Login with (cryptographic) passwords

[anisfeld]

Describe Your Changes

• adjusts login to use passwords (see #130)

Non-Obvious Technical Information

Checklist Before Requesting a Review

• [x] The code runs successfully.

2024-02-21 23:19:54 INFO:     172.18.0.1:43500 - "GET /admin/login HTTP/1.1" 200 OK
... 
2024-02-21 23:20:06 DEBUG:      detected 'bcrypt' backend, version '4.0.1'
2024-02-21 23:20:06 DEBUG:      'bcrypt' backend lacks $2$ support, enabling workaround
2024-02-21 23:20:06 INFO:     172.18.0.1:44072 - "POST /admin/login HTTP/1.1" 302 Found
2024-02-21 23:20:06 INFO:     172.18.0.1:44072 - "GET /admin/dashboard HTTP/1.1" 200 OK

[anisfeld]

closes #130