Create Dockerfile

Dockerfile

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+# Dockerfile for Perchance Image-Generation Server (for Hugging Face Spaces)
+# Based on Debian-slim + Python. Installs Chromium runtime libs so zendriver
+# can operate in headless mode where allowed.
+FROM python:3.12-slim
+
+# runtime env
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PORT=7860 \
+    ZD_HEADLESS=true \
+    NO_INITIAL_FETCH=true
+
+WORKDIR /app
+
+# install system deps (chromium runtime libs + common utils)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ca-certificates \
+    curl \
+    gnupg \
+    wget \
+    unzip \
+    fonts-liberation \
+    libnss3 \
+    libxss1 \
+    libasound2 \
+    libatk1.0-0 \
+    libcups2 \
+    libx11-xcb1 \
+    libxcomposite1 \
+    libxdamage1 \
+    libxrandr2 \
+    libgbm1 \
+    libgtk-3-0 \
+    libxshmfence1 \
+    procps \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Chromium (Debian's package name may vary across distros).
+# In many slim images the package is "chromium" or "chromium-browser".
+# Try chromium; if your target base differs, change accordingly.
+RUN apt-get update && apt-get install -y --no-install-recommends chromium \
+    || true && rm -rf /var/lib/apt/lists/*
+
+# Safety: set CHROME_BIN to where Chromium usually is installed
+ENV CHROME_BIN=/usr/bin/chromium
+
+# copy requirements first (docker layer caching)
+COPY requirements.txt /app/requirements.txt
+
+# upgrade pip and install python deps
+RUN python -m pip install --upgrade pip setuptools wheel \
+ && pip --no-cache-dir install -r /app/requirements.txt
+
+# copy app sources
+COPY . /app
+
+# make start script executable
+COPY start.sh /app/start.sh
+RUN chmod +x /app/start.sh
+
+# expose port
+EXPOSE ${PORT}
+
+# Start the server.
+# Use sh -c so ${PORT} expansion works in exec form.
+CMD ["sh", "-c", "/app/start.sh"]