chore: Update Dockerfile to follow Hugging Face's Dockerfile best practices

Dockerfile

@@ -1,10 +1,11 @@
+# read the doc: https://huggingface.co/docs/hub/spaces-sdks-docker
+# you will also find guides on how best to write your Dockerfile
+
 FROM tiangolo/uvicorn-gunicorn:python3.10-slim
 
-# Copy the current directory contents into the container at /app
-COPY . /app
+COPY . .
 
-# Set the working directory to /app
-WORKDIR /app
+WORKDIR /
 
 # Install requirements.txt 
 RUN pip install --no-cache-dir --upgrade -r /requirements.txt