Upgrade docker for codegen (#1352)

tools/docker/Dockerfile

@@ -1,14 +1,13 @@
-FROM mcr.microsoft.com/powershell:lts-7.2-ubuntu-18.04
+FROM mcr.microsoft.com/powershell:lts-7.2-ubuntu-22.04
 
 # Install dependencies and clean up
 RUN apt-get update \
     && apt-get install -y curl \
-    && curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash \
+    && apt-get install -y dotnet-sdk-8.0 \
+    && curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash \
     && . /root/.bashrc \
-    && nvm install 14.15.5 \
-    && npm config set unsafe-perm true \
+    && nvm install 18.20.4 \
     && npm install -g autorest \
-    && npm install -g dotnet-sdk-2.1 \
     && apt-get -o Acquire::Check-Valid-Until=false install -y \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/* \