Update Dockerfile

Dockerfile

@@ -1,14 +1,33 @@
 # read the doc: https://huggingface.co/docs/hub/spaces-sdks-docker
 # you will also find guides on how best to write your Dockerfile
 
-FROM python:3.9
+# use the official Python 3.9 Docker image as the base image 
+FROM python:3.9 
 
+# sets working directory inside the container to /code. 
+# this is where we'll copy our application code and dependencies later
 WORKDIR /code
 
+# copies the requirements.txt file from our local to /code directory inside the container
 COPY ./requirements.txt /code/requirements.txt
 
+# install the packages listed in requirements.txt
 RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
-COPY . .
+# create new user named user with a user ID of 1000
+RUN useradd -m -u 1000 user
+# switch to that user
+USER user
+# ENV command sets the HOME and PATH environment variables
+ENV HOME=/home/user \\
+    PATH=/home/user/.local/bin:$PATH
 
+# sets the working directory inside the container to $HOME/user/app
+WORKDIR $HOME/app
+
+# copy the our local directory contents into /home/user/app directory inside the container
+COPY --chown=user . $HOME/app
+
+# run when the container starts
+# starts the FastAPI app using uvicorn and port 7860
 CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]