Update to .NET Core 2.1 & pin images

docker-compose.yml

@@ -34,7 +34,7 @@ services:
       - back-tier
 
   redis:
-    image: redis:alpine
+    image: redis:5.0-alpine3.10
     container_name: redis
     ports: ["6379"]
     networks:

worker/Dockerfile

@@ -1,10 +1,16 @@
-FROM microsoft/dotnet:2.0.0-sdk
+FROM mcr.microsoft.com/dotnet/core/sdk:2.1 as builder
 
-WORKDIR /code
+WORKDIR /Worker
+COPY src/Worker/Worker.csproj .
+RUN dotnet restore
 
-ADD src/Worker /code/src/Worker
+COPY src/Worker/ .
+RUN dotnet publish -c Release -o /out Worker.csproj
 
-RUN dotnet restore -v minimal src/Worker \
-    && dotnet publish -c Release -o "./" "src/Worker/" 
+# app image
+FROM mcr.microsoft.com/dotnet/core/runtime:2.1
 
-CMD dotnet src/Worker/Worker.dll
+WORKDIR /app
+ENTRYPOINT ["dotnet", "Worker.dll"]
+
+COPY --from=builder /out .

worker/src/Worker/Worker.csproj

@@ -1,19 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
-    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-    <AssemblyName>Worker</AssemblyName>
     <OutputType>Exe</OutputType>
-    <PackageId>Worker</PackageId>
-    <ServerGarbageCollection>true</ServerGarbageCollection>
-    <RuntimeFrameworkVersion>2.0.0</RuntimeFrameworkVersion>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="StackExchange.Redis" Version="1.1.604-alpha" />
-    <PackageReference Include="Npgsql" Version="3.1.3" />
-    <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
+    <PackageReference Include="StackExchange.Redis" Version="2.0.601" />
+    <PackageReference Include="Npgsql" Version="4.0.9" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
   </ItemGroup>
 
 </Project>