Fix Dockerfile for fastapi

Dockerfile

@@ -1,30 +1,20 @@
-FROM python:3.9-slim as builder
+# Use an official Python runtime as the base image
+FROM python:3.9-slim
 
-# Create and change to the app directory.
+# Set the working directory in the container
 WORKDIR /app
 
-# Retrieve application dependencies.
-# This allows the container build to reuse cached dependencies.
-# Expecting to copy go.mod and if present go.sum.
-COPY requirements.txt ./
-RUN pip install -r requirements.txt
+# Copy the requirements file into the container
+COPY requirements.txt .
 
-# Copy local code to the container image.
-COPY . ./
+# Install the required packages
+RUN pip install --no-cache-dir -r requirements.txt
 
-# Build the binary.
-RUN fastapi run
+# Copy the rest of the application code into the container
+COPY . .
 
-# Use the official Debian slim image for a lean production container.
-# https://hub.docker.com/_/debian
-# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
-FROM debian:buster-slim
-RUN set -x && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
-    ca-certificates && \
-    rm -rf /var/lib/apt/lists/*
+# Expose the port that FastAPI will run on
+EXPOSE 8000
 
-# Copy the binary to the production image from the builder stage.
-COPY --from=builder /app/server /app/server
-
-# Run the web service on container startup.
-CMD ["/app/server"]
+# Command to run the FastAPI application
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]