fix: Correct TypeError in Gradio app mounting

The mount_gradio_app function was being used incorrectly. This commit replaces it with a FastAPI instance and mounts the Gradio app on top of it. Also adds a .gitignore file to exclude __pycache__ directories.

.gitignore

@@ -0,0 +1,2 @@
+__pycache__/
+logviewer/__pycache__/

logviewer/app.py

@@ -215,7 +215,10 @@ with gr.Blocks(theme=gr.themes.Soft(), css="#log_content textarea { font-family:
         outputs=gr.File(label="Download Filtered Log")
     )
 
-app = gr.mount_gradio_app(demo, path="/")
+from fastapi import FastAPI
+
+app = FastAPI()
+app = gr.mount_gradio_app(app, demo, path="/")
 
 if __name__ == "__main__":
     import uvicorn