Dockerfile sample copying first .sln and .csproj only and restore

Dockerfile

FROM mcr.microsoft.com/dotnet/sdk:5.0-buster-slim AS builder
WORKDIR /build

COPY src/*.sln ./nuget.config ./
COPY src/*/*.csproj ./
RUN for from in ./*.csproj; do to=$(echo "$from" | sed 's/\/\([^/]*\)\.csproj$/\/\1&/') \
    && mkdir -p "$(dirname "$to")" && mv "$from" "$to"; done

RUN dotnet restore --configfile ./nuget.config

COPY src/. ./
RUN dotnet build