Update Dockerfile

Dockerfile

@@ -1,9 +1,9 @@
 FROM python:3.10-slim
 
-# Set the DEBIAN_FRONTEND to noninteractive to avoid warnings during apt-get install
+# Set the DEBIAN_FRONTEND to noninteractive
 ENV DEBIAN_FRONTEND=noninteractive
 
-# 1. Install base dependencies, now including xauth for xvfb.
+# 1. Install the base dependencies that we know are required.
 RUN apt-get update && apt-get install -y --no-install-recommends \
     wget \
     ca-certificates \
@@ -12,18 +12,19 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libxrender1 \
     xfonts-75dpi \
     xfonts-base \
-    xvfb \
-    xauth \
-    && rm -rf /var-lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists/*
 
-# 2. Download and install the legacy dependencies using the correct, verified URLs.
+# 2. As requested, create a writable font cache directory.
+RUN mkdir -p /var/cache/fontconfig && chmod 777 /var/cache/fontconfig
+
+# 3. Download and install the legacy dependencies.
 RUN set -ex; \
     wget http://archive.debian.org/debian/pool/main/libj/libjpeg-turbo/libjpeg62-turbo_1.5.2-2+deb10u1_amd64.deb && \
     wget http://security.debian.org/debian-security/pool/updates/main/o/openssl/libssl1.1_1.1.1w-0+deb11u4_amd64.deb && \
     apt-get install -y ./*.deb && \
     rm ./*.deb
 
-# 3. With all dependencies satisfied, download and install wkhtmltox.
+# 4. With all dependencies satisfied, download and install wkhtmltox.
 RUN wget https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6-1/wkhtmltox_0.12.6-1.buster_amd64.deb && \
     apt-get install -y --no-install-recommends ./wkhtmltox_0.12.6-1.buster_amd64.deb && \
     rm ./wkhtmltox_0.12.6-1.buster_amd64.deb && \