Simplify database setup by preconfiguring credentials and instructions

Adds preconfigured PostgreSQL credentials and setup instructions to .env and documentation.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 91318273-c764-4fd4-be04-bdc12c38af32
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setup-postgres.sql

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+-- Script de configuration PostgreSQL pour RegisFlow
+-- Exécuter sur votre serveur PostgreSQL externe
+
+-- Se connecter en tant que superutilisateur postgres :
+-- sudo -u postgres psql
+
+-- 1. Créer l'utilisateur RegisFlow
+CREATE USER regisflow WITH PASSWORD 'RegisFlow2024!';
+
+-- 2. Créer la base de données RegisFlow
+CREATE DATABASE regisflow OWNER regisflow;
+
+-- 3. Donner tous les privilèges à l'utilisateur
+GRANT ALL PRIVILEGES ON DATABASE regisflow TO regisflow;
+
+-- 4. Se connecter à la base regisflow pour configurer les permissions
+\c regisflow
+
+-- 5. Donner les permissions sur le schéma public
+GRANT ALL PRIVILEGES ON SCHEMA public TO regisflow;
+GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO regisflow;
+GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public TO regisflow;
+
+-- 6. Permissions par défaut pour les futurs objets
+ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON TABLES TO regisflow;
+ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON SEQUENCES TO regisflow;
+
+-- 7. Vérifier la configuration
+SELECT usename, usecreatedb, usesuper FROM pg_user WHERE usename = 'regisflow';
+SELECT datname, datowner FROM pg_database WHERE datname = 'regisflow';
+
+-- Configuration terminée !
+-- Utilisateur: regisflow
+-- Mot de passe: RegisFlow2024!
+-- Base de données: regisflow