Create Dockerfile

Dockerfile

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+# Use an official Python runtime as a parent image
+# Using a specific version like 3.10 or 3.11 is recommended over 'latest'
+FROM python:3.10-slim
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE 1  # Prevents python from writing .pyc files
+ENV PYTHONUNBUFFERED 1      # Ensures logs print directly to terminal
+ENV PORT=7860               # Define the port the app will run on *inside* the container
+
+# Set the working directory in the container
+WORKDIR /app
+
+# Install system dependencies if needed (e.g., build tools) - add if required later
+# RUN apt-get update && apt-get install -y --no-install-recommends some-package && rm -rf /var/lib/apt/lists/*
+
+# Copy the requirements file into the container
+COPY requirements.txt .
+
+# Install Python dependencies
+# --no-cache-dir reduces image size
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy the rest of the application code into the container
+COPY . .
+
+# Expose the port the app runs on
+# This informs Docker that the container listens on this port
+EXPOSE ${PORT}
+
+# Define the command to run the application
+# Use 0.0.0.0 to listen on all network interfaces inside the container
+# Uvicorn will listen on the port defined by the $PORT env var (7860)
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]