Update Dockerfile

Dockerfile

@@ -4,21 +4,26 @@ FROM python:3.9-slim
 # Set the working directory inside the container
 WORKDIR /app
 
-# Update package lists and install ALL necessary system dependencies for wkhtmltopdf
-# This now includes the ones that caused the previous error, resolving the dpkg failure.
+# CRITICAL FIX: The wkhtmltox package requires libssl1.1, which is not in the new Debian repos.
+# We must manually add the repository for the older Debian "Buster" release to find this package.
+RUN echo "deb http://deb.debian.org/debian buster main" >> /etc/apt/sources.list
+
+# Update the package lists to include the newly added "Buster" repository.
+# Then, install all necessary dependencies. apt will now be able to find libssl1.1.
 RUN apt-get update && apt-get install -y --no-install-recommends \
     wget \
     fontconfig \
     libjpeg62-turbo \
-    libssl1.1 \
     libxext6 \
     xfonts-75dpi \
     xfonts-base \
     libxrender1 \
+    # This will now succeed because we added the buster repo
+    libssl1.1 \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
-# Now, download and install the package. It will succeed because its dependencies are present.
+# Now that all dependencies are present, download and install the wkhtmltox package.
 RUN wget https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6-1/wkhtmltox_0.12.6-1.buster_amd64.deb && \
     dpkg -i wkhtmltox_0.12.6-1.buster_amd64.deb && \
     rm wkhtmltox_0.12.6-1.buster_amd64.deb
@@ -30,7 +35,7 @@ COPY app.py .
 # Install the Python dependencies
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Expose the port that Flask will run on (matches app.py)
+# Expose the port that Flask will run on
 EXPOSE 7860
 
 # The command to start your Flask application when the container launches