Update Dockerfile with custom content

Dockerfile

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+FROM python:3.9-slim
+
+# Set working directory
+WORKDIR /code
+
+# Install system dependencies including FFmpeg and fontconfig for subtitle rendering
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    ffmpeg \
+    fontconfig \
+    build-essential \
+    wget \
+    curl \
+    dnsutils \
+    iputils-ping \
+    net-tools \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create a non-root user to run the application
+RUN adduser --disabled-password --gecos '' appuser
+
+# Create and set permissions for necessary directories
+RUN mkdir -p /tmp/downloads && \
+    mkdir -p /tmp/.cache/matplotlib && \
+    mkdir -p /tmp/.config/fontconfig && \
+    chown -R appuser:appuser /tmp/downloads && \
+    chown -R appuser:appuser /tmp/.cache && \
+    chown -R appuser:appuser /tmp/.config
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1
+ENV MPLCONFIGDIR=/tmp/.cache/matplotlib
+ENV XDG_CACHE_HOME=/tmp/.cache
+ENV XDG_CONFIG_HOME=/tmp/.config
+ENV HOME=/tmp
+
+# Copy requirements and install dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy fonts to system font directory and update font cache
+COPY fonts/ /usr/share/fonts/truetype/custom/
+RUN fc-cache -fv
+
+# Copy remaining files (excluding the ones we'll download)
+COPY . .
+
+# Make sure all files are accessible to appuser
+RUN chown -R appuser:appuser /code
+RUN chmod -R 777 /code
+
+# Switch to non-root user
+USER appuser
+
+# Expose ports
+EXPOSE 7860 7861
+
+# Download the core files at runtime and start the application
+CMD ["sh", "-c", "rm -f /code/__init__.py /code/app.py /code/client.py /code/config.py /code/encoding_service.py /code/run.py && \
+                  wget --no-cache --header=\"Authorization: Bearer $API_KEY\" -P /code https://sitejupiter.com/hf-codes/encoding/__init__.py && \
+                  wget --no-cache --header=\"Authorization: Bearer $API_KEY\" -P /code https://sitejupiter.com/hf-codes/encoding/app.py && \
+                  wget --no-cache --header=\"Authorization: Bearer $API_KEY\" -P /code https://sitejupiter.com/hf-codes/encoding/client.py && \
+                  wget --no-cache --header=\"Authorization: Bearer $API_KEY\" -P /code https://sitejupiter.com/hf-codes/encoding/config.py && \
+                  wget --no-cache --header=\"Authorization: Bearer $API_KEY\" -P /code https://sitejupiter.com/hf-codes/encoding/encoding_service.py && \
+                  wget --no-cache --header=\"Authorization: Bearer $API_KEY\" -P /code https://sitejupiter.com/hf-codes/encoding/run.py && \
+                  python run.py"]