added new ts ruby php to app.py

app.py

@@ -50,6 +50,12 @@ def get_language_by_extension(file_extension):
         return 'javascript'
     elif file_extension == 'css':
         return 'css'
+    elif file_extension in ['ts', 'typescript', 'tsx']:
+        return 'typescript'
+    elif file_extension in ['rb', 'ruby']:
+        return 'ruby'
+    elif file_extension == 'php':
+        return 'php'
     else:
         return None