vienalatina/docs/server-setup.md

Server setup — step by step (Hetzner CX22, Ubuntu 24.04)

Every command you need, in order. Commands prefixed local$ run on your own computer; everything else runs on the server over SSH. Budget ~2–3 hours.

Where you see pablo, <SERVER-IP>, or a password placeholder, substitute your own values.

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0. Order the server

At console.hetzner.com → Create Server:

• Location: Nuremberg
• Image: Ubuntu 24.04
• Type: Shared vCPU → CX22 (2 vCPU, 4 GB RAM, €4.51/mo)
• SSH key: add your public key (local$ cat ~/.ssh/id_ed25519.pub — if you don't have one: local$ ssh-keygen -t ed25519). Adding it here means root login works by key from the start, no password emails.

Note the server's IP address — that's <SERVER-IP> everywhere below.

1. DNS (do this first — it needs time to propagate)

At your domain registrar, add two A records:

Name	Type	Value	TTL
git	A	<SERVER-IP>	300
ci	A	<SERVER-IP>	300

Do NOT touch the record for vienalatina.com itself — the live WordPress site keeps running until cutover day.

Check propagation (repeat until it prints the server IP):

local$ dig +short git.vienalatina.com

2. First login + basic hardening

local$ ssh root@<SERVER-IP>

Update and create your user:

apt update && apt -y upgrade

adduser pablo                 # pick a strong password, skip the questions
usermod -aG sudo pablo

# give your user the same SSH key root has
rsync --archive --chown=pablo:pablo ~/.ssh /home/pablo

Lock SSH down to keys only:

sed -i 's/^#\?PasswordAuthentication.*/PasswordAuthentication no/' /etc/ssh/sshd_config
sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin no/' /etc/ssh/sshd_config
systemctl restart ssh

Before closing this terminal, open a second one and confirm you can get in:

local$ ssh pablo@<SERVER-IP>

From here on, work as pablo and prefix privileged commands with sudo (or run sudo -i once).

Firewall + brute-force protection:

sudo apt install -y ufw fail2ban
sudo ufw allow OpenSSH
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw --force enable
sudo systemctl enable --now fail2ban

3. Install Caddy

sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https curl
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' \
  | sudo gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' \
  | sudo tee /etc/apt/sources.list.d/caddy-stable.list
sudo apt update && sudo apt install -y caddy

4. Install Docker

curl -fsSL https://get.docker.com | sudo sh
sudo usermod -aG docker pablo

Log out and back in (exit, then ssh pablo@<SERVER-IP>) so the docker group takes effect. Verify: docker ps should print an empty table, not a permission error.

5. Get this repo's infra files onto the server

sudo mkdir -p /srv /var/www/vienalatina.com
cd ~
git clone https://github.com/pablovolenski/vienalatina.git
sudo cp -r vienalatina/infra/gitea /srv/gitea
sudo cp -r vienalatina/infra/woodpecker /srv/woodpecker
sudo cp vienalatina/infra/caddy/Caddyfile /etc/caddy/Caddyfile
sudo systemctl reload caddy

6. Bring up Gitea

cd /srv/gitea
sudo docker compose up -d

Wait ~30 s, then open https://git.vienalatina.com in your browser (the certificate is fetched automatically; if you get an error, wait a minute for DNS/certificate and reload). You'll see Gitea's install page:

• Database: SQLite3 (fine at this scale)
• Server domain / base URL: leave as pre-filled (git.vienalatina.com)
• Administrator account (bottom of the page — expand it): username pablo, your email, a strong password. Create it now; the first account is the admin.
• Click Install Gitea.

Then create the two OAuth apps and the bot user, all in the Gitea web UI:

1. Woodpecker OAuth app: profile icon → Site Administration → Integrations → Applications → Create new OAuth2 application
   • Name: woodpecker
   • Redirect URI: https://ci.vienalatina.com/authorize
   • Save the Client ID and Client Secret — needed in step 7.
2. Decap OAuth app: same screen, second application
   • Name: decap-cms
   • Redirect URI: https://vienalatina.com/admin/ (exactly, trailing slash included — Gitea matches it literally)
   • Untick "Confidential Client". Decap runs in the browser and authenticates with PKCE; a confidential app makes Gitea demand a client secret that a browser cannot keep, and the login fails after you authorize, which makes it look like a Decap bug.
   • Save the Client ID — it goes into static/admin/config.yml (step 9). There is no secret to save, and the Client ID is not one either: it is published in the site's JavaScript by design.
3. Translations bot: Site Administration → Identity & Access → User Accounts → Create User Account
   • Username: translations, email: translations@vienalatina.com, any strong password.
   • Log in as the bot user once (private window), go to Settings → Applications → Generate New Token, scopes: repository (write). Save the token — it becomes the gitea_push_token secret in step 8.

7. Bring up Woodpecker

cd /srv/woodpecker
sudo cp .env.example .env
openssl rand -hex 32        # copy the output
sudo nano .env              # paste Woodpecker OAuth client ID + secret + the random hex
sudo mkdir -p data && sudo chown -R 1000:1000 data   # v3 images run as uid 1000
sudo docker compose up -d

Open https://ci.vienalatina.com → Login → it bounces you to Gitea → Authorize. You're in, as admin (the WOODPECKER_ADMIN=pablo line in the compose file — edit it if your Gitea username differs).

8. Create the site repo and wire the pipeline

Create the repo in Gitea: + (top right) → New Repository → name vienalatina, owner pablo, not initialized with anything → Create.

Add the translations bot as collaborator: repo → Settings → Collaborators → add translations with Write access.

Push the code into Gitea (from the server clone you made in step 5, or from your laptop):

cd ~/vienalatina
git remote add gitea https://git.vienalatina.com/pablo/vienalatina.git
git push gitea main

(It will ask for your Gitea username/password.)

In Woodpecker (https://ci.vienalatina.com):

1. Repositories → Add repository → enable pablo/vienalatina (this auto-creates the push webhook in Gitea).
2. Repo → Settings → Project settings → check Trusted (needed so the deploy step may mount /var/www/vienalatina.com).
3. Repo → Settings → Secrets → add gitea_push_token, the bot token from step 6.3. That is the only secret — translation runs locally and needs no key.

Build the translation image before the first run (~5 minutes; it downloads about 1GB of model):

cd ~/vienalatina
docker build -t vienalatina/translate:1 docker/translate

The push in the step above has already triggered a first pipeline — it ran before the image and secret existed, so push a new commit rather than using Restart. Restart replays the old commit, and a restart's empty diff range makes the translate step find nothing to do. All three steps (translate → build → deploy) should go green, and /var/www/vienalatina.com/ on the server now contains the built site:

ls /var/www/vienalatina.com     # index.html, de/, pt-br/, robots.txt, llms.txt …

9. Point Decap at Gitea

On your working copy: edit static/admin/config.yml, replace REPLACE_WITH_GITEA_OAUTH_CLIENT_ID with the Decap OAuth Client ID from step 6.2, commit, push to Gitea. (You can't log into /admin until the main domain is live — that's expected.)

cd ~/vienalatina
sed -i 's/REPLACE_WITH_GITEA_OAUTH_CLIENT_ID/<client id>/' static/admin/config.yml
grep app_id static/admin/config.yml
git commit -am "Wire Decap to the Gitea OAuth app" && git push gitea main

This value is per-deployment: the placeholder is what belongs in the repo, so leave it in place in any copy of this platform that is not this server.

If /admin/ still shows Client ID not registered afterwards, the page is serving a cached config.yml — hard-reload it. If it fails after the Gitea authorize screen instead, the app was created as a confidential client; delete it and recreate it with that box unticked.

10. Test the translation loop end-to-end

cd ~/vienalatina
cat > content/post/mi-test.es.md <<'EOF'
---
title: "Artículo de prueba"
date: 2026-08-01
lang: es
manual_translation: false
categories: [Comunidad]
---

Esto es una prueba del flujo de traducción automática en el Grätzl.
EOF
git add . && git commit -m "test: pipeline round-trip" && git push gitea main

Within ~60 s the Woodpecker pipeline should finish and content/post/mi-test.de.md + content/post/mi-test.pt-br.md appear in the Gitea repo as commits by translations. Note "Grätzl" survives untranslated (protected term). Delete all three test files with another commit when done.

Saturday complete. 🎉

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Cutover day (Sunday evening)

1. Run the content migration and push (see README, "One-shot content migration"). Migrated Polylang siblings arrive frozen (manual_translation: true) because they are human translations — the machine engine must never overwrite them. Then python scripts/translate.py --backfill fills in any set that WordPress had no translation for. Spot-check the built site with grep on /var/www/vienalatina.com/index.html; the curl -H "Host: vienalatina.com" http://127.0.0.1/ trick only works after step 3, since Caddy has no matching site block until then.
2. At the registrar: lower the vienalatina.com A record TTL to 300, wait for the old TTL to expire, then change the A record to <SERVER-IP> (and www too, as CNAME to vienalatina.com or A to the same IP).
3. On the server: uncomment the vienalatina.com blocks in /etc/caddy/Caddyfile, then sudo systemctl reload caddy. Caddy fetches the certificate as soon as DNS resolves to this server.
4. Verify: the checklist in the migration plan (hreflang tags, robots.txt, llms.txt, Lighthouse, manual_translation: true freeze test, and the loop-prevention test — after the bot pushes siblings, the pipeline it triggers must report "nothing to translate" rather than translating the siblings back).
5. Keep the WP host untouched for 30 days as fallback; watch Google Search Console and add Caddy 301s for any 404s it reports.

Optional: nightly backups (restic → Hetzner Storage Box)

sudo apt install -y restic
sudo restic -r sftp:uXXXXXX@uXXXXXX.your-storagebox.de:backups init
# then a root cron entry, e.g.:
# 0 3 * * * restic -r sftp:... backup /srv /var/www --password-file /root/.restic-pw

11. Members area (/comunidad/)

The private area: roles and an internal board. It is the only part of the site that runs code to answer a request, and the only data on the server that is not already in git.

11.1 Register the OAuth application

Gitea → Site Administration → Integrations → Applications → Create new OAuth2 application:

• Name: vienalatina-board
• Redirect URI: https://vienalatina.com/comunidad/auth/callback
• Leave "Confidential Client" TICKED.

That last point is the opposite of the Decap application in step 6.2, and the difference is worth understanding rather than memorising. Decap runs in the visitor's browser, where any secret would be readable by the visitor, so it has to be a public client using PKCE. The board runs on the server, so it can hold a secret and should — a confidential client is the stronger of the two.

Save the Client ID and the Client Secret.

11.2 Optional: a token for creating accounts

Without it, admins can add people who already have a Gitea login, and nothing else changes. With it, they can create the Gitea account from inside the members area and hand over a one-time password.

Log in as a Gitea site administrator → Settings → Applications → Generate New Token → scope admin (write).

Understand what this token is before you create it: it can create and modify any account on the instance, including administrators. Anything that can read the board's environment — the compose file, docker inspect, a shell in the container — can use it. If you would rather not have that on the box, leave GITEA_ADMIN_TOKEN empty and create accounts in Gitea by hand.

11.3 Build and run

cd ~/vienalatina
docker build -t vienalatina/board:1 -f docker/board/Dockerfile .

sudo mkdir -p /srv/board/data
sudo cp -r infra/board/. /srv/board/
cd /srv/board
sudo cp .env.example .env
openssl rand -hex 32          # paste as BOARD_SECRET_KEY
sudo nano .env                # client id, secret, BOARD_OWNER, optional admin token
sudo chown -R 1000:1000 /srv/board/data
sudo docker compose up -d

BOARD_OWNER is applied once, to an empty database, and ignored from then on. It cannot be used to take ownership later: that is deliberate, because otherwise editing a file on disk would be a quieter route to the top than asking for it. Ownership moves only through Transferir titularidad inside the app.

11.4 Route it through Caddy

Add to the vienalatina.com block in /etc/caddy/Caddyfile (already present in infra/caddy/Caddyfile):

@board path /comunidad /comunidad/*
reverse_proxy @board 127.0.0.1:8080

Then sudo caddy validate --config /etc/caddy/Caddyfile && sudo systemctl reload caddy.

Both paths are matched on purpose: Flask redirects /comunidad to /comunidad/, and matching only the trailing-slash form lets the bare path fall through to the static site and 404.

11.5 Back it up — this part is not optional

Everything else on this server is reproducible from the repository. The board's threads, comments and membership exist in exactly one place.

sudo apt install -y sqlite3
crontab -e
# 15 4 * * *  /home/pablo/vienalatina/scripts/backup-board.sh >> /home/pablo/board-backup.log 2>&1

The script uses SQLite's .backup rather than copying the file, because the database is live and in WAL mode — a plain cp can capture it missing its most recent commits. Test a restore before you rely on it: stop the container, gunzip a backup over /srv/board/data/board.db, start it again.

11.6 Who can do what

	Owner	Admin	User
Post, comment, edit own	✓	✓	✓
Delete any post	✓	✓	—
Edit someone else's post	—	—	—
Pin and close threads	✓	✓	—
Create users	✓	✓	—
Create admins	✓	—	—
Suspend a user	✓	✓	—
Suspend an admin	✓	—	—
Transfer ownership	✓	—	—

Nobody edits anyone else's words, administrators included. Taking a post down is visible to the person who wrote it; rewriting it is not, and an admin who could do that could leave a sentence attributed to a member who never wrote it.

There is exactly one owner, and the database enforces it with a unique index rather than trusting the application to remember. The owner cannot be suspended or demoted by anyone, themselves included — to step down, transfer ownership to an admin.

11.7 Personal data

Members' names, emails and writing are personal data under GDPR.

• Erasure: the owner's Eliminar removes the member row entirely and reassigns their threads and comments to a tombstone shown as "Miembro eliminado", so conversations other people took part in stay readable.
• Access: any member can download everything they have written from Descargar mis datos.
• Retention: soft-deleted posts stay in the database until removed by hand. If you want a real retention limit, that is a DELETE ... WHERE deleted_at < in this same cron slot — and a decision to take deliberately, not by default.