Update Dockerfile

Dockerfile

@@ -3,21 +3,35 @@ FROM python:3.9-slim
 
 # Create a dedicated, non-root user for security.
 RUN useradd -m -u 1000 user
+
+# Switch to this new user.
 USER user
 
-# Set environment variables
+# Set environment variables that will be available to the 'user'.
 ENV HOME=/home/user
+
+# --- THIS IS THE FIX ---
+# Add the user's local binary directory to the system's PATH.
+# This ensures that executables installed by pip (like uvicorn) can be found.
 ENV PATH=$HOME/.local/bin:$PATH
+
+# Set the cache directory for transformers.
 ENV TRANSFORMERS_CACHE=$HOME/.cache
+
+# Set the working directory for the application.
 WORKDIR $HOME/app
 
-# Copy and install requirements
+# Copy and own the requirements file.
 COPY --chown=user:user ./requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
 
-# Copy the application file
+# Install Python dependencies.
+RUN pip install --no-cache-dir --upgrade -r requirements.txt
+
+# Copy and own the application file.
 COPY --chown=user:user ./app.py .
 
-# Expose the port and run the app
+# Expose the port the app will run on.
 EXPOSE 7860
+
+# Command to run your app. Now 'uvicorn' can be found in the PATH.
 CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]