Update prompt_dir in main.py to use relative path

main.py

@@ -7,7 +7,7 @@ class Message(BaseModel):
     instruction: str
 
 # Getting the prompt from the prompt.txt file
-prompt_dir = "/prompt.txt"
+prompt_dir = "prompt.txt"
 prompt = ''
 with open(prompt_dir, 'r') as file:
     prompt = file.read()