resolving DS-0017 finding

Dockerfile

@@ -3,6 +3,7 @@ FROM mcr.microsoft.com/powershell:7.5-ubuntu-24.04
 USER root
 
 RUN apt-get update \
+    && apt-get install -y --no-install-recommends ca-certificates \
     && apt-get dist-upgrade -y \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
@@ -12,4 +13,4 @@ USER 1000:1000
 WORKDIR /data
 COPY ["Start-DoneTickNotifier.ps1", "/data/"]
 
-ENTRYPOINT ["pwsh", "-Command", "/data/Start-DoneTickNotifier.ps1"]
+ENTRYPOINT ["pwsh", "-Command", "/data/Start-DoneTickNotifier.ps1"]