Update Dockerfile

Dockerfile

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+#Dockerfile sets up a Python 3.9 environment, installs the packages
+#listed in requirements.txt, and starts a FastAPI app on port 7860
+
+#We're going to use the Python 3.9 Docker Image as the base image for our container
+FROM python:3.9
+
+#Sets the working directory inside the container to '/code'
+WORKDIR /code
+
+#Copies the requirements.txt file from our local directory to the '/code' directory inside the container
+COPY ./requirements.txt /code/requirements.txt
+
+#Use pip to install the packages and to not use any cached packages, and to upgrade any packages.
+RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
+
+#Creates a new user with user ID of 1000, switches to that user and then sets the home directory to '/home/user'
+#The ENV command sets the HOME and PATH environment variables.
+#PATH is modified to include the '.local/bin' directory in the user's home directory so that anyt binaries installed by pip will be available on the command line
+RUN useradd -m -u 1000 user
+USER user
+ENV HOME=/home/user \\
+    PATH=/home/user/.local/bin:$PATH
+
+#Sets the working directory inside the container to $HOME/app, which is '/home/user/app'
+WORKDIR $HOME/app
+
+#Copies the contents of our local directory into the '/home/user/app' directory inside the container, setting the owner of the files to the user we created earlier
+COPY --chown=user . $HOME/app
+
+#Specifies the command to run when the container starts
+#Starts the FastAPI app using uvicorn and listens on port 7860
+#The '--host' flage specifies that the app should listen on all available network interfaces
+#The 'app:app' argument tells 'uvicorn' to look for the app object in the app module in our code
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]
+