Add NuGet.config to sample Dockerfiles

Author: lbussell

samples/aspnetapp/Dockerfile

@@ -2,7 +2,7 @@ FROM mcr.microsoft.com/dotnet/framework/sdk:4.8.1 AS build
 WORKDIR /app
 
 # copy csproj and restore as distinct layers
-COPY *.sln .
+COPY *.sln NuGet.config ./
 COPY aspnetapp/*.csproj ./aspnetapp/
 COPY aspnetapp/*.config ./aspnetapp/
 RUN nuget restore

samples/aspnetapp/NuGet.config

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" />
+  </packageSources>
+</configuration>

samples/aspnetmvcapp/Dockerfile

@@ -2,7 +2,7 @@ FROM mcr.microsoft.com/dotnet/framework/sdk:4.8.1 AS build
 WORKDIR /app
 
 # copy csproj and restore as distinct layers
-COPY *.sln .
+COPY *.sln NuGet.config ./
 COPY aspnetmvcapp/*.csproj ./aspnetmvcapp/
 COPY aspnetmvcapp/*.config ./aspnetmvcapp/
 RUN nuget restore

samples/aspnetmvcapp/NuGet.config

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" />
+  </packageSources>
+</configuration>

samples/dotnetapp/Dockerfile

@@ -2,7 +2,7 @@ FROM mcr.microsoft.com/dotnet/framework/sdk:4.8.1 AS build
 WORKDIR /app
 
 # copy csproj and restore as distinct layers
-COPY *.csproj .
+COPY NuGet.config *.csproj ./
 RUN dotnet restore
 
 # copy and build everything else

samples/dotnetapp/NuGet.config

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="dotnet-public" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json" />
+  </packageSources>
+</configuration>