Add .NET 8 / Update to Node 22 (#799)

Dockerfile

@@ -1,15 +1,4 @@
-FROM node:21.7.3-bookworm-slim AS base
-
-# Prerequisites
-
-# renovate: datasource=repology depName=debian_12/ca-certificates versioning=loose
-ENV CACERTIFICATES_VERSION=20230311
-
-# Ca-Certificates is required for connection to Azure DevOps
-RUN apt-get update -y && \
-    apt-get install -y --no-install-recommends ca-certificates=${CACERTIFICATES_VERSION} && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
+FROM ghcr.io/swissgrc/azure-pipelines-node:22.3.0-net8 AS base
 
 FROM base AS build