docs: setup docusaurus for documentation (#848)

* docs: setup docusaurus for documentation

* docs: setup tailwind content for docusaurus

* chore: ensure tailwindcss is installed so pages deploy works

* docs: add cname to point to docs

* ci: override format checking for pnpm-lock in gen-docs folder

* docs(gen-docs): readme for docusaurus

* chore(gen-docs): remove unnecessary image files

* docs: remove installation instructions (moved to docs)

* ci: rename docusaurus workflows to a more explicit name

* style(gen-docs): custom color for links

* docs: add more doc pages

* style: gradient menu link bg, proper jellyseerr font & footer bg color

* docs: fix proper link to relative pages

* style: tab-items also now uses the proper jellyseerr colors

* style: use prismTheme shadesOfPurple for codeblock/syntax highlighting

* docs: fix broken links

* docs: fix broken links

* docs: fix broken anchors

* chore(gen-docs): local search bar

* style(gen-docs): tab colors

* docs: reverse-proxy documentation

* style(gen-docs): jellyseerr-like cards

* docs: rename baremetal to build from source

* docs: nixpkg version check component

* docs: conditionally render override package derivation block and admonitions

* docs: users section of the documentation

docs/using-jellyseerr/notifications/discord.md

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+---
+title: Discord
+description: Configure Discord notifications.
+sidebar_position: 3
+---
+
+# Discord
+
+The Discord notification agent enables you to post notifications to a channel in a server you manage.
+
+:::info
+Users can optionally opt-in to being mentioned in Discord notifications by configuring their [Discord user ID](https://support.discord.com/hc/en-us/articles/206346498-Where-can-I-find-my-User-Server-Message-ID-) in their user settings.
+:::
+
+## Configuration
+
+### Webhook URL
+
+You can find the webhook URL in the Discord application, at **Server Settings → Integrations → Webhooks**.
+
+### Bot Username (optional)
+
+If you would like to override the name you configured for your bot in Discord, you may set this value to whatever you like!
+
+### Bot Avatar URL (optional)
+
+Similar to the bot username, you can override the avatar for your bot.

docs/using-jellyseerr/notifications/email.md

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+---
+title: Email
+description: Configure email notifications for your users.
+sidebar_position: 1
+---
+
+# Email
+
+## Configuration
+
+:::info
+If the [Application URL](/using-jellyseerr/settings/general#application-title) setting is configured in **Settings → General**, Jellyseerr will explicitly set the origin server hostname when connecting to the SMTP host.
+:::
+
+### Sender Name (optional)
+
+Configure a friendly name for the email sender (e.g., "Jellyseerr").
+
+### Sender Address
+
+Set this to the email address you would like to appear in the "from" field of the email message.
+
+Depending on your email provider, this may need to be an address you own. For example, Gmail requires this to be your actual email address.
+
+### SMTP Host
+
+Set this to the hostname or IP address of your SMTP server.
+
+### SMTP Port
+
+Set this to a supported port number for your SMTP host. `465` and `587` are commonly used.
+
+### Encryption Method
+
+In most cases, [Use Implicit TLS](https://tools.ietf.org/html/rfc8314) should be selected for port 465, and [Use STARTTLS](https://en.wikipedia.org/wiki/Opportunistic_TLS) if available for port 587. Please refer to your email provider's documentations for details on how to configure this setting.
+
+The default value for this setting is **Use STARTTLS if available**.
+
+### SMTP Username & Password
+
+:::info
+If your account has two-factor authentication enabled, you may need to create an application password instead of using your account password.
+:::
+Configure these values as appropriate to authenticate with your SMTP host.
+
+### PGP Private Key & Password (optional)
+
+Configure these values to enable encrypting and signing of email messages using [OpenPGP](https://www.openpgp.org/). Note that individual users must also have their **PGP public keys** configured in their user settings in order for PGP encryption to be used in messages addressed to them.
+
+When configuring the PGP keys, be sure to keep the entire contents of the key intact. For example, private keys always begin with `-----BEGIN PGP PRIVATE KEY BLOCK-----` and end with `-----END PGP PRIVATE KEY BLOCK-----`.

docs/using-jellyseerr/notifications/index.mdx

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+---
+title: Notifications
+description: Configure notifications for your users.
+sidebar_position: 3
+---
+
+# Notifications
+
+## Supported Notification Agents
+
+Jellyseerr currently supports the following notification agents:
+
+import DocCardList from '@theme/DocCardList';
+
+<DocCardList />
+
+## Setting Up Notifications
+
+Simply configure your desired notification agents in **Settings -> Notifications** in the Jellyseerr web UI.
+
+Users can customize their notification preferences in their own user notification settings.
+
+## Requesting New Notification Agents
+
+If we do not currently support your preferred notification agent, feel free to [submit a feature request on GitHub](https://github.com/Fallenbagel/jellyseerr/issues). However, please be sure to search first and confirm that there is not already an existing request for the agent!

docs/using-jellyseerr/notifications/webpush.md

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+---
+title: Web Push
+description: Configure web push notifications for your users.
+sidebar_position: 2
+---
+
+# Web Push
+
+The web push notification agent enables you and your users to receive Jellyseerr notifications in a supported browser.
+
+This notification agent does not require any configuration, but is not enabled in Jellyseerr by default.
+
+:::warning
+Web push notifications require a secure connection to your Jellyseerr instance. Refer to the [Reverse Proxy](/extending-jellyseerr/reverse-proxy) documentation for more information.
+:::
+
+To set up web push notifications, simply enable the agent in **Settings → Notifications → Web Push**. You and your users will then be prompted to allow notifications in your web browser.
+
+Users can opt out of these notifications, or customize the notification types they would like to subscribe to, in their user settings.
+
+:::info
+Web push notifications offer a native notification experience without the need to install an app.
+:::