Fix environment variable mapping for Render.com deployment

- Handle both underscore and double-underscore formats for environment variables
- Add debug logging to show which environment variables are found
- Support Render.com's ConnectionStrings__MongoDB format
- Support Render.com's Jwt__Key, Jwt__Issuer, Jwt__Audience formats
- Support Render.com's EmailSettings__ and CloudinarySettings__ formats
- Resolve configuration loading issues in production deployment

Author: Dang

VehicleShowroomManagement/src/WebAPI/Program.cs

@@ -45,73 +45,98 @@
     // Add environment variables to configuration
     builder.Configuration.AddEnvironmentVariables();
 
-    // Map environment variables to configuration keys
-    var mongoConnectionString = Environment.GetEnvironmentVariable("MONGODB_CONNECTION_STRING");
+    // Debug: Log all environment variables that start with our prefixes
+    Log.Information("Checking environment variables...");
+    var envVars = Environment.GetEnvironmentVariables();
+    foreach (DictionaryEntry envVar in envVars)
+    {
+        var key = envVar.Key.ToString();
+        if (key.StartsWith("MONGODB_") || key.StartsWith("JWT_") || key.StartsWith("EMAIL_") || 
+            key.StartsWith("CLOUDINARY_") || key.StartsWith("ConnectionStrings__") || 
+            key.StartsWith("Jwt__") || key.StartsWith("EmailSettings__") || key.StartsWith("CloudinarySettings__"))
+        {
+            Log.Information("Found environment variable: {Key}", key);
+        }
+    }
+    
+    // Map environment variables to configuration keys (handle both formats)
+    var mongoConnectionString = Environment.GetEnvironmentVariable("MONGODB_CONNECTION_STRING") 
+        ?? Environment.GetEnvironmentVariable("ConnectionStrings__MongoDB");
     if (!string.IsNullOrWhiteSpace(mongoConnectionString))
     {
         builder.Configuration["ConnectionStrings:MongoDB"] = mongoConnectionString;
         Log.Information("MongoDB connection string loaded from environment variable");
     }
 
-    var jwtKey = Environment.GetEnvironmentVariable("JWT_KEY");
+    var jwtKey = Environment.GetEnvironmentVariable("JWT_KEY") 
+        ?? Environment.GetEnvironmentVariable("Jwt__Key");
     if (!string.IsNullOrWhiteSpace(jwtKey))
     {
         builder.Configuration["Jwt:Key"] = jwtKey;
         Log.Information("JWT Key loaded from environment variable");
     }
 
-    var jwtIssuer = Environment.GetEnvironmentVariable("JWT_ISSUER");
+    var jwtIssuer = Environment.GetEnvironmentVariable("JWT_ISSUER") 
+        ?? Environment.GetEnvironmentVariable("Jwt__Issuer");
     if (!string.IsNullOrWhiteSpace(jwtIssuer))
     {
         builder.Configuration["Jwt:Issuer"] = jwtIssuer;
         Log.Information("JWT Issuer loaded from environment variable");
     }
 
-    var jwtAudience = Environment.GetEnvironmentVariable("JWT_AUDIENCE");
+    var jwtAudience = Environment.GetEnvironmentVariable("JWT_AUDIENCE") 
+        ?? Environment.GetEnvironmentVariable("Jwt__Audience");
     if (!string.IsNullOrWhiteSpace(jwtAudience))
     {
         builder.Configuration["Jwt:Audience"] = jwtAudience;
         Log.Information("JWT Audience loaded from environment variable");
     }
 
-    // Map other environment variables
-    var emailHost = Environment.GetEnvironmentVariable("EMAIL_SMTP_HOST");
+    // Map other environment variables (handle both formats)
+    var emailHost = Environment.GetEnvironmentVariable("EMAIL_SMTP_HOST") 
+        ?? Environment.GetEnvironmentVariable("EmailSettings__SmtpHost");
     if (!string.IsNullOrWhiteSpace(emailHost))
     {
         builder.Configuration["EmailSettings:SmtpHost"] = emailHost;
     }
 
-    var emailPort = Environment.GetEnvironmentVariable("EMAIL_SMTP_PORT");
+    var emailPort = Environment.GetEnvironmentVariable("EMAIL_SMTP_PORT") 
+        ?? Environment.GetEnvironmentVariable("EmailSettings__SmtpPort");
     if (!string.IsNullOrWhiteSpace(emailPort))
     {
         builder.Configuration["EmailSettings:SmtpPort"] = emailPort;
     }
 
-    var emailUsername = Environment.GetEnvironmentVariable("EMAIL_SMTP_USERNAME");
+    var emailUsername = Environment.GetEnvironmentVariable("EMAIL_SMTP_USERNAME") 
+        ?? Environment.GetEnvironmentVariable("EmailSettings__SmtpUsername");
     if (!string.IsNullOrWhiteSpace(emailUsername))
     {
         builder.Configuration["EmailSettings:SmtpUsername"] = emailUsername;
     }
 
-    var emailPassword = Environment.GetEnvironmentVariable("EMAIL_SMTP_PASSWORD");
+    var emailPassword = Environment.GetEnvironmentVariable("EMAIL_SMTP_PASSWORD") 
+        ?? Environment.GetEnvironmentVariable("EmailSettings__SmtpPassword");
     if (!string.IsNullOrWhiteSpace(emailPassword))
     {
         builder.Configuration["EmailSettings:SmtpPassword"] = emailPassword;
     }
 
-    var cloudinaryCloudName = Environment.GetEnvironmentVariable("CLOUDINARY_CLOUD_NAME");
+    var cloudinaryCloudName = Environment.GetEnvironmentVariable("CLOUDINARY_CLOUD_NAME") 
+        ?? Environment.GetEnvironmentVariable("CloudinarySettings__CloudName");
     if (!string.IsNullOrWhiteSpace(cloudinaryCloudName))
     {
         builder.Configuration["CloudinarySettings:CloudName"] = cloudinaryCloudName;
     }
 
-    var cloudinaryApiKey = Environment.GetEnvironmentVariable("CLOUDINARY_API_KEY");
+    var cloudinaryApiKey = Environment.GetEnvironmentVariable("CLOUDINARY_API_KEY") 
+        ?? Environment.GetEnvironmentVariable("CloudinarySettings__ApiKey");
     if (!string.IsNullOrWhiteSpace(cloudinaryApiKey))
     {
         builder.Configuration["CloudinarySettings:ApiKey"] = cloudinaryApiKey;
     }
 
-    var cloudinaryApiSecret = Environment.GetEnvironmentVariable("CLOUDINARY_API_SECRET");
+    var cloudinaryApiSecret = Environment.GetEnvironmentVariable("CLOUDINARY_API_SECRET") 
+        ?? Environment.GetEnvironmentVariable("CloudinarySettings__ApiSecret");
     if (!string.IsNullOrWhiteSpace(cloudinaryApiSecret))
     {
         builder.Configuration["CloudinarySettings:ApiSecret"] = cloudinaryApiSecret;