Update docs/configuring-playbook.md and docs/container-images.md: add explanations to each section

These sentences are copied from README.md

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

README.md

@@ -160,7 +160,7 @@ Services that help you in administrating and monitoring your Matrix installation
 
 ### Misc
 
-Various services that don't fit any other category.
+Various services that don't fit any other categories.
 
 | Name | Default? | Description | Documentation |
 | ---- | -------- | ----------- | ------------- |

docs/configuring-playbook.md

@@ -66,6 +66,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### Clients
 
+Web clients for Matrix that you can host on your own domains.
+
 - [Configuring Element](configuring-playbook-client-element.md), if you're going with the default/recommended client
 
 - [Setting up Hydrogen](configuring-playbook-client-hydrogen.md), if you've enabled [Hydrogen](https://github.com/element-hq/hydrogen-web), a lightweight Matrix client with legacy and mobile browser support
@@ -76,6 +78,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### Authentication and user-related
 
+Extend and modify how users are authenticated on your homeserver.
+
 - [Setting up Matrix Authentication Service](configuring-playbook-matrix-authentication-service.md) (Next-generation auth for Matrix, based on OAuth 2.0/OIDC)
 
 - [Setting up Appservice Double Puppet](configuring-playbook-appservice-double-puppet.md)
@@ -98,6 +102,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### File Storage
 
+Use alternative file storage to the default `media_store` folder.
+
 - [Storing Matrix media files on Amazon S3 with Goofys](docs/configuring-playbook-s3-goofys.md)
 
 - [Storing Synapse media files on Amazon S3 or another compatible Object Storage](configuring-playbook-s3.md)
@@ -106,6 +112,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### Bridging other networks
 
+Bridges can be used to connect your Matrix installation with third-party communication networks.
+
 - [Setting up Mautrix Discord bridging](configuring-playbook-bridge-mautrix-discord.md)
 
 - [Setting up Mautrix Telegram bridging](configuring-playbook-bridge-mautrix-telegram.md)
@@ -167,6 +175,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### Bots
 
+Bots provide various additional functionality to your installation.
+
 - [Setting up baibot](configuring-playbook-bot-baibot.md) - a bot through which you can talk to various [AI](https://en.wikipedia.org/wiki/Artificial_intelligence) / [Large Language Models](https://en.wikipedia.org/wiki/Large_language_model) services ([OpenAI](https://openai.com/)'s [ChatGPT](https://openai.com/blog/chatgpt/) and [others](https://github.com/etkecc/baibot/blob/main/docs/providers.md))
 
 - [Setting up matrix-reminder-bot](configuring-playbook-bot-matrix-reminder-bot.md) - a bot to remind you about stuff
@@ -187,6 +197,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### Administration
 
+Services that help you in administrating and monitoring your Matrix installation.
+
 - [Setting up Prometheus Alertmanager integration via matrix-alertmanager-receiver](configuring-playbook-alertmanager-receiver.md)
 
 - [Enabling metrics and graphs (Prometheus, Grafana) for your Matrix server](configuring-playbook-prometheus-grafana.md)
@@ -204,6 +216,8 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### Other specialized services
 
+Various services that don't fit any other categories.
+
 - [Setting up the Sliding Sync proxy](configuring-playbook-sliding-sync-proxy.md) for clients which require Sliding Sync support (like Element X)
 
 - [Setting up Synapse Auto Invite Accept](configuring-playbook-synapse-auto-accept-invite.md)

docs/container-images.md

@@ -15,6 +15,8 @@ We try to stick to official images (provided by their respective projects) as mu
 
 ## Clients
 
+Web clients for Matrix that you can host on your own domains.
+
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
 | [Element](configuring-playbook-client-element.md) | [vectorim/element-web](https://hub.docker.com/r/vectorim/element-web/) | ✓ | Web UI, which is configured to connect to your own Synapse server by default |
@@ -24,6 +26,8 @@ We try to stick to official images (provided by their respective projects) as mu
 
 ## Server Components
 
+Services that run on the server to make the various parts of your installation work.
+
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
 | [PostgreSQL](configuring-playbook-external-postgres.md) | [postgres](https://hub.docker.com/_/postgres/) | ✓ | Database for Synapse. [Using an external PostgreSQL server](configuring-playbook-external-postgres.md) is also possible. |
@@ -36,6 +40,8 @@ We try to stick to official images (provided by their respective projects) as mu
 
 ## Authentication
 
+Extend and modify how users are authenticated on your homeserver.
+
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
 | [matrix-synapse-rest-auth](configuring-playbook-rest-auth.md) | (N/A) | x | REST authentication password provider module |
@@ -47,6 +53,8 @@ We try to stick to official images (provided by their respective projects) as mu
 
 ## File Storage
 
+Use alternative file storage to the default `media_store` folder.
+
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
 | [Goofys](configuring-playbook-s3-goofys.md) | [ewoutp/goofys](https://hub.docker.com/r/ewoutp/goofys/) | x | [Amazon S3](https://aws.amazon.com/s3/) (or other S3-compatible object store) storage for Synapse's content repository (`media_store`) files |
@@ -55,6 +63,8 @@ We try to stick to official images (provided by their respective projects) as mu
 
 # Bridges
 
+Bridges can be used to connect your Matrix installation with third-party communication networks.
+
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
 | [mautrix-discord](configuring-playbook-bridge-mautrix-discord.md) | [mautrix/discord](https://mau.dev/mautrix/discord/container_registry) | x | Bridge to [Discord](https://discord.com/) |
@@ -88,6 +98,8 @@ We try to stick to official images (provided by their respective projects) as mu
 
 ## Bots
 
+Bots provide various additional functionality to your installation.
+
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
 | [baibot](configuring-playbook-bot-baibot.md) | [etke.cc/baibot](https://ghcr.io/etkecc/baibot) | x | A bot that exposes the power of [AI](https://en.wikipedia.org/wiki/Artificial_intelligence) / [Large Language Models](https://en.wikipedia.org/wiki/Large_language_model) to you |
@@ -101,6 +113,8 @@ We try to stick to official images (provided by their respective projects) as mu
 
 ## Administration
 
+Services that help you in administrating and monitoring your Matrix installation.
+
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
 | [matrix-alertmanager-receiver](configuring-playbook-alertmanager-receiver.md) | [metio/matrix-alertmanager-receiver](https://hub.docker.com/r/metio/matrix-alertmanager-receiver)  | x | Prometheus' [Alertmanager](https://prometheus.io/docs/alerting/latest/alertmanager/) client |
@@ -116,6 +130,8 @@ We try to stick to official images (provided by their respective projects) as mu
 
 ## Misc
 
+Various services that don't fit any other categories.
+
 | Service | Container image | Default? | Description |
 | ------- | --------------- | -------- | ----------- |
 | [sliding-sync](configuring-playbook-sliding-sync-proxy.md) | [matrix-org/sliding-sync](https://ghcr.io/matrix-org/sliding-sync) | x | Sliding Sync support for clients which require it (e.g. Element X) |