added the official docker cli

-switched to user 1000 for security.
-added user to docker group
-properly mounted btrfs drive on host allows users to create snapshots

Dockerfile

@@ -1,34 +1,48 @@
 # Use LinuxServer.io Duplicati base
 FROM linuxserver/duplicati:2.1.0
 
-# Install Docker CLI, bash, python3
-RUN apt-get update && \
-  DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+# Install Docker CLI, bash, python3, btrfs support and all the app directories
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends \
+  ca-certificates \
+  curl \
+  gnupg \
+  lsb-release \
   bash \
   python3 \
   python3-pip \
-  docker.io \
   btrfs-progs \
-  ca-certificates curl && \
-  rm -rf /var/lib/apt/lists/*
+  && mkdir -p /etc/apt/keyrings \
+  && curl -fsSL "https://download.docker.com/linux/$(. /etc/os-release; echo "$ID")/gpg" \
+  | gpg --dearmor -o /etc/apt/keyrings/docker.gpg \
+  && echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
+  https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
+  $(lsb_release -cs) stable" \
+  | tee /etc/apt/sources.list.d/docker.list > /dev/null \
+  && apt-get update \
+  && apt-get install -y --no-install-recommends \
+  docker-ce-cli \
+  && groupadd -f docker \
+  && usermod -aG docker abc \
+  && rm -rf /var/lib/apt/lists/* \
+  && mkdir -p /usr/local/bin /config /etc/services.d/backupbot
 
-# Create directories for backup scripts and logs
-RUN mkdir -p /usr/local/bin /config/log /config/web /etc/services.d/backupbot
-
-# Copy backup script
+# Copy the backup script
 COPY backup.sh /usr/local/bin/backup.sh
 RUN chmod +x /usr/local/bin/backup.sh
 
-# Copy the environment variables for the config
-COPY backupbot.env /defaults/backupbot.env
+# Copy the environment variables for backupbot
+COPY backupbot.conf /defaults/backupbot.conf
+RUN chown www-data:www-data /defaults/backupbot.conf \
+  && chmod 644 /defaults/backupbot.conf
 
 # Copy s6 service for backupbot
 COPY services/backupbot/run /etc/services.d/backupbot/run
 RUN chmod +x /etc/services.d/backupbot/run
 
 # Copy web frontend
-COPY web /defaults/web
-RUN chmod +x /defaults/web/cgi-bin/backupbot.cgi
+COPY web /app
+RUN chmod +x /app/cgi-bin/backupbot.cgi
 # Expose web frontend port
 EXPOSE 8080