Created Setting up Authentication (markdown)

Setting-up-Authentication.md

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+ArchiveBox supports 4 types of authentication currently.
+
+*These docs are a work in progress, follow the links to learn more about each authentication setup.*  
+
+If you encounter any issues or need help feel free to ask questions in our public forum: https://zulip.archivebox.io
+
+---
+
+### Username & Password (the default)
+
+```bash
+archivebox manage createsuperuser
+
+archivebox manage changepassword
+```
+
+- https://github.com/ArchiveBox/ArchiveBox/wiki/Configuration#admin_username--admin_password
+
+### Reverse Proxy Authentication (e.g. Authelia)
+
+- https://github.com/ArchiveBox/ArchiveBox/wiki/Configuration#reverse_proxy_user_header
+- https://github.com/ArchiveBox/ArchiveBox/wiki/Configuration#reverse_proxy_whitelist
+- https://github.com/ArchiveBox/ArchiveBox/wiki/Configuration#logout_redirect_url
+- https://github.com/ArchiveBox/ArchiveBox/pull/866
+
+### LDAP Authentication
+
+- https://github.com/ArchiveBox/ArchiveBox/wiki/Configuration#ldap
+- https://github.com/ArchiveBox/ArchiveBox/pull/1214
+- https://github.com/django-auth-ldap/django-auth-ldap#example-configuration
+- https://jumpcloud.com/blog/what-is-ldap-authentication
+
+### API Token Authentication
+
+The new REST API released in v0.8.0 supports several methods of authentication using an API token.
+
+First, generate your API key in your Admin UI: `[/admin/api/apitoken/add/`](http://127.0.0.1:8000/admin/api/apitoken/add/).
+You can read the API docs and test the authentication methods here: [`/api/v1/docs`](http://127.0.0.1:8000/api/v1/docs).
+
+- passing Bearer=xyz as a bearer token request header
+- passing `X-API-Key=xyz` as a request header
+- passing `api_key=xyz` as a GET/POST query parameter
+- fallback: passing username & password via HTTP Basic Authentication (not recommended)
+
+<img width="738" alt="Screenshot 2024-05-03 at 4 40 22 PM" src="https://github.com/ArchiveBox/ArchiveBox/assets/511499/ad914143-f48b-4d4e-aa8c-f89a2c70cee7">
+
+---
+
+## Web Server UI Permissions
+
+Make sure to set up your Web UI permissions to allow or prevent guest access to content according to your needs. See the links below for more information.
+
+- https://github.com/ArchiveBox/ArchiveBox/wiki/Configuration#public_index--public_snapshots--public_add_view
+- https://github.com/ArchiveBox/ArchiveBox/wiki/Security-Overview