chore: Update .NET to 8

Author: strazhnyk

DocuSign.Workspaces/DocuSign.Workspaces/Dockerfile

@@ -1,6 +1,6 @@
 #See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
 
-FROM mcr.microsoft.com/dotnet/aspnet:7.0-bullseye-slim AS base
+FROM mcr.microsoft.com/dotnet/aspnet:8.0-bullseye-slim AS base
 
 WORKDIR /app
 EXPOSE 80
@@ -14,7 +14,7 @@ RUN echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesourc
 RUN apt-get update && apt-get install nodejs -y
 RUN npm install -g @angular/cli && npm update
 
-FROM mcr.microsoft.com/dotnet/sdk:7.0-bullseye-slim AS build
+FROM mcr.microsoft.com/dotnet/sdk:8.0-bullseye-slim AS build
 
 WORKDIR /src
 COPY ["DocuSign.Workspaces/*.sln", "DocuSign.Workspaces/"]