# atom.town!

some kind of hosting setup

## setup

1. log into the vps, make sure it's fedora (or else 🔪)
2. create a new admin user
    - `sudo useradd -m -G wheel admin`
    - `sudo passwd admin`
    - `sudo su - admin`
3. use the system setup script, and log out
    - `sudo dnf install git -y`
    - `git clone https://gitlab.com/futile/atom.town`
    - `./atom.town/scripts/system-setup.sh`
    - `exit`
4. log in again, populate the `.env` and start everything up
    - `cd atom.town`
    - `micro .env`
    - `docker compose up`
5. continue with service-specific setups .....

## services

specifics for everything

**currently serving**

- via docker
  - **caddy** – http server & reverse proxy
  - **stalwart** – mailserver
  - **bulwark** – webmail
  - **gitea** – git server
- via caddy
  - `post.atom.town` – mailserver, mail admin, and oidc
  - `mail.atom.town` – webmail
  - `git.atom.town` – git

**dns setup**

| type  | host      | value                       | notes                      |
|-------|-----------|---------------------------- |----------------------------|
| `A`   | `@`       | `<ip>`                      | apex domain                |
| `A`   | `post`    | `<ip>`                      | mailserver                 |
| `A`   | `mail`    | `<ip>`                      | webmail                    |
| `A`   | `git`     | `<ip>`                      | gitea                      |
| `CAA` | `@`       | `0 issue "letsencrypt.org"` | allow caddy to issue certs |
| `MX`  | `@`       | `post.atom.town` / `10`     | mail record                |

### caddy

> [!NOTE]
> **todo** // detail setup

### stalwart

<details>
    <summary>initial setup</summary>

1. server identity
    - server hostname: `post.atom.town`
    - default email domain: `atom.town`
    - automatically obtain tls certificate: `true`
    - generate email signing keys: `true`
2. storage
    - main data storage: `rocksdb`
    - path: `/var/lib/stalwart/`
3. account directory
    - directory type: `use internal`
4. logging
    - log destination: `console`
5. automatic dns management
    - dns server type: `porkbun`
    - description: `porkbun`
</details>

<details>
    <summary>further setup</summary>

- settings -> security -> allowed ips
  - added `172.18.0.0/16`; reason: `docker internal`
- settings -> network -> http -> security
  - permissive cors policy: `true`   **[restart needed]**
- settings -> authentication -> oidc provider
  - oauth settings
    - key: `secret read from environment variable`
    - variable name: `OIDC_KEY`
  - openid connect
    - signature algorithm: `ECDSA using P-384 and SHA-384`
    - signature key: `secret read from environment variable`
    - variable name: `OIDC_SIGNATURE_KEY`
- management -> directory -> oauth clients
  - create oauth client
    - client id: `gitea`
    - description: `Gitea`
    - client secret: `<generate_secret>`
    - redirect uris: `https://git.atom.town/user/oauth2/Stalwart/callback`
</details>

<details>
    <summary>useful links</summary>

- https://stalw.art/docs
- https://testconnectivity.microsoft.com/tests/Imap/input
- https://mail-tester.com
</details>

### bulwark

> [!NOTE]
> **todo** // detail setup

<details>
    <summary>useful links</summary>

- https://bulwarkmail.org/docs
</details>

### gitea

<details>
    <summary>initial setup</summary>

- database settings
  - database type: `sqlite3`
  - path: `/data/gitea/gitea.db`
- general settings
  - site title: `We cock. Dick. BALLING.`
  - server domain: `git.atom.town`
  - ssh server port: `22`
  - gitea base url: `https://git.atom.town/`
  - enable update checker: `true`
- email settings
  - smtp host: `post.atom.town`
  - smtp port: `465`
  - send email as: `"Gitea" <system@atom.town>`
  - smtp username: `system@atom.town`
  - smtp password: `<password>`
  - enable email notifications: `true`
- server and third-party service settings
  - enable openid sign-in: `false`
  - disable self-registration: `false`
  - allow registration only through external services: `true`
  - enable openid self-registration: `true`
  - hidden email domain: `git.atom.town`
  - password hash algorithm: `argon2`
</details>

<details>
    <summary>further setup</summary>

- admin settings -> identity & access -> authentication sources
  - add authentication source
    - authentication type: `OAuth2`
    - authentication name: `Stalwart`
    - oauth2 provider: `OpenID Connect`
    - client id (key): `gitea`
    - client secret: `<secret_from_stalwart>`
    - openid connect auto discovery url: `https://post.atom.town/.well-known/openid-configuration`
</details>

## backups

backups are done with [vykar](https://vykar.borgbase.com) to [borgbase](https://borgbase.com)

always remember to `docker compose stop` before doing any of this!

**creating**

- if on a new borgbase repo, run `vykar init` first
- to back up, run `sudo vykar backup` (sudo required as we are accessing `/var/lib/docker/volumes/`)
- to back up automatically, run `sudo EDITOR=micro crontab -e` and add the following:
  ```
  TZ=UTC
  0 6 * * * /home/admin/atom.town/scripts/volume-backup.sh
  ```

**restoring**

the restore process is kind of fucked up but doable

- restore on new system
  - run `vykar list` to find a snapshot to use
  - `sudo rm -rf /var/lib/docker/volumes/`
  - then `sudo vykar restore abcd1234 /var/lib/docker/volumes/`
  - figure out the UID:GID for all containers and `sudo chown -R UID:GID /var/lib/docker/volumes/.../_data/` their respective volumes
- restore on same system
  - run `vykar list` to find a snapshot to use
  - then `sudo vykar restore abcd1234 /var/lib/docker/volumes/`

## todo

- further secure the server (ratelimiting, hardening...)
- figure out best way to store .env, other credentials, and various secrets
- more services
  - ~~gitea (need to change host ssh port)~~
  - vaultwarden
- ~~tie all services together with an sso~~
- use postgres for everything

## misc

**useful commands**

- `docker exec <service> env`