Debug fahclient installation with error handling

Dockerfile

@@ -1,23 +1,20 @@
 FROM ghcr.io/hassio-addons/debian-base:7.2.0
-
-# Set up package sources
-RUN echo "deb http://deb.debian.org/debian bullseye main" > /etc/apt/sources.list && \
+RUN \
+    echo "deb http://deb.debian.org/debian bullseye main" > /etc/apt/sources.list && \
     apt-get update && \
     apt-get install -y --no-install-recommends \
         curl \
         ca-certificates \
         gnupg && \
     curl -sSL https://download.foldingathome.org/releases/public/fah-client/debian-10-64bit/release/fah-client_8.4.9_amd64.deb -o /fahclient.deb && \
-  dpkg -i /fahclient.deb || apt-get install -f -y && \
+    echo "Installing fahclient..." && \
+    dpkg -i /fahclient.deb && \
+    apt-get install -f -y && \
+    echo "Verifying installation..." && \
+    ls -l /usr/bin/fahclient || echo "fahclient not found" && \
     rm /fahclient.deb && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
-
-# Copy rootfs
 COPY rootfs /
-
-# Expose port
 EXPOSE 7396
-
-# Default command with support for CLI args
 CMD ["/usr/bin/fahclient", "--config", "/config/config.xml", "${CLI_ARGS}"]