refactor: optimize Dockerfiles for quicker builds

.dockerignore

@@ -0,0 +1,2 @@
+bin/
+obj/

Dockerfile

@@ -1,15 +1,14 @@
 FROM mcr.microsoft.com/dotnet/core/sdk:2.1-alpine
-
-COPY . /src
 WORKDIR /src
-RUN dotnet --version && dotnet --info
+
+COPY *.csproj ./
 RUN dotnet restore
-RUN dotnet clean
-RUN dotnet build -c Release
+
+COPY . ./
+RUN dotnet build -c Release -o out
 
 FROM mcr.microsoft.com/dotnet/aspnet:2.1
-
-COPY --from=0 /src/bin/Release/netcoreapp2.1/publish/ App/
 WORKDIR /App
+COPY --from=0 /src/out .
 ENV ASPNETCORE_ENVIRONMENT=Release
 ENTRYPOINT ["dotnet", "pwt-0x01-ng.dll"]

Dockerfile.dev

@@ -1,12 +1,10 @@
 FROM mcr.microsoft.com/dotnet/core/sdk:2.1-alpine
-
-COPY . /src
 WORKDIR /src
 
-RUN dotnet --version && dotnet --info
+COPY *.csproj ./
 RUN dotnet restore
-RUN dotnet clean
 
+COPY . ./
 RUN dotnet build -c Debug
 
 ENV ASPNETCORE_ENVIRONMENT=Development