Environemnts refactor

src/Backend/DiunaBI.Infrastructure/Services/GoogleSheetsHelper.cs

@@ -24,12 +24,15 @@ public class GoogleSheetsHelper
     }
     private static GoogleCredential GetCredentialsFromFile()
     {
-        var fileName = "client_secrets.json";
 #if DEBUG
-        fileName = "client_secrets.Development.json";
+        using var stream = new FileStream("client_secrets.Development.json", FileMode.Open, FileAccess.Read);
+        return GoogleCredential.FromStream(stream).CreateScoped(Scopes);
+#else
+        var json = Environment.GetEnvironmentVariable("GOOGLE_SERVICE_ACCOUNT_JSON");
+        if (string.IsNullOrWhiteSpace(json))
+            throw new InvalidOperationException("GOOGLE_SERVICE_ACCOUNT_JSON environment variable is not set.");
+        json = json.Replace("\\n", "\n");
+        return GoogleCredential.FromJson(json).CreateScoped(Scopes);
 #endif
-        using var stream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
-        var credential = GoogleCredential.FromStream(stream).CreateScoped(Scopes);
-        return credential;
     }
 }