Add example env

.env.example

@@ -1,18 +1,38 @@
+# ==============================================
+# Biergarten App - Environment Variables Template
+# ==============================================
+#
+# This file contains backend/Docker environment variables.
+# Copy this to create environment-specific files:
+#   - .env.dev (development)
+#   - .env.test (testing)
+#   - .env.prod (production)
+#
+# For frontend variables, create a separate .env.local file
+# in the Website/ directory. See README.md for complete docs.
+#
+# ==============================================
+
 # ======================
 # Database Configuration
 # ======================
 
-# SQL Server Connection Components
+# SQL Server Connection Components (Recommended for Docker)
 # These are used to build connection strings dynamically
 DB_SERVER=sqlserver,1433
 DB_NAME=Biergarten
 DB_USER=sa
 DB_PASSWORD=YourStrong!Passw0rd
 
+# Alternative: Full Connection String (Local Development)
+# If set, this overrides the component-based configuration above
+# DB_CONNECTION_STRING=Server=localhost,1433;Database=Biergarten;User Id=sa;Password=YourStrong!Passw0rd;TrustServerCertificate=True;
+
 # ======================
 # JWT Configuration
 # ======================
 
-# JWT Secret for signing tokens (generate using: openssl rand -base64 32)
+# JWT Secret for signing tokens
+# IMPORTANT: Generate a secure secret (minimum 32 characters)
+# Command: openssl rand -base64 32
 JWT_SECRET=128490218jfklsdajfdsa90f8sd0fid0safasr31jl2k1j4AFSDR
-