Add deployment notes

DEPLOY_NOTES.md

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+# Notes de deploiement - OpenSquared PWA
+
+Date: 2026-04-26
+
+## Depot
+
+```text
+https://gitea.open-squared.tech/admin/openbot.git
+branche main
+```
+
+Commits importants:
+
+```text
+fb8cc4d Initial PWA assistant proof of concept
+94148e8 Rename installed PWA to OpenSquared
+1f815fa Version PWA icon asset to refresh Android cache
+1b9933d Fix voice button audio unlock hang
+```
+
+## VPS
+
+```text
+Serveur: 46.202.173.47
+Dossier app: /root/openbot
+Domaine: bot.open-squared.tech
+URL: https://bot.open-squared.tech
+```
+
+L'app Flask a ete testee sur:
+
+```text
+http://46.202.173.47:8080/health
+https://bot.open-squared.tech/health
+```
+
+## Python
+
+Sur le VPS, `python3 -m venv .venv` a d'abord echoue car `python3.12-venv` manquait.
+
+Correctif:
+
+```bash
+apt update
+apt install -y python3.12-venv
+cd /root/openbot
+python3 -m venv .venv
+source .venv/bin/activate
+pip install -r requirements.txt
+```
+
+## HTTPS et Nginx Docker
+
+Le VPS utilise deja un `docker-compose.yml` avec un conteneur `nginx`.
+
+Montage nginx:
+
+```text
+/root/tradon/nginx/conf -> /etc/nginx/conf.d
+/etc/letsencrypt -> /etc/letsencrypt:ro
+/root/tradon/nginx/certbot -> /var/www/certbot
+```
+
+Le bloc HTTP doit servir les challenges avant la redirection:
+
+```nginx
+location /.well-known/acme-challenge/ {
+    root /var/www/certbot;
+}
+
+location / {
+    return 301 https://$host$request_uri;
+}
+```
+
+Certificat cree avec:
+
+```bash
+certbot certonly --webroot \
+  -w /root/tradon/nginx/certbot \
+  -d bot.open-squared.tech
+```
+
+Le bloc HTTPS `bot.open-squared.tech` doit utiliser:
+
+```nginx
+ssl_certificate /etc/letsencrypt/live/bot.open-squared.tech/fullchain.pem;
+ssl_certificate_key /etc/letsencrypt/live/bot.open-squared.tech/privkey.pem;
+```
+
+Proxy depuis nginx Docker vers Flask sur l'hote:
+
+```nginx
+proxy_pass http://172.17.0.1:8080;
+```
+
+Verifier:
+
+```bash
+docker exec nginx nginx -t
+docker exec nginx nginx -s reload
+curl -I https://bot.open-squared.tech/health
+```
+
+## PWA Android
+
+Nom installe:
+
+```text
+OpenSquared
+```
+
+Icone:
+
+```text
+static/icons/icon-v2.svg
+```
+
+Pour forcer Android/Chrome a prendre la nouvelle icone:
+
+1. `git pull` sur le VPS.
+2. Ouvrir `https://bot.open-squared.tech/icons/icon-v2.svg`.
+3. Desinstaller l'ancienne PWA.
+4. Reinstaller depuis Chrome.
+
+## Cache et bouton micro
+
+Le bouton `Demarrer` etait non reactif sur navigateur parce que `unlockAudio()` pouvait rester bloque sur `audio.play()` avec un audio vide.
+
+Correctif applique:
+
+- `unlockAudio()` utilise maintenant `AudioContext`.
+- `index.html` charge `/app.js?v=4`.
+- Service worker: `opensquared-assistant-v4`.
+
+Si le bouton ne reagit pas apres un deploiement:
+
+```text
+PC: Ctrl+F5
+Android: fermer l'app, rouvrir Chrome, ou desinstaller/reinstaller la PWA
+```
+
+Si ca persiste, ouvrir F12 -> Console et lire l'erreur JS.