Use only 1 Dockerfile for Windows

Dockerfile.1709

@@ -1,14 +0,0 @@
-FROM stefanscherer/golang-windows:1709 AS build
-
-COPY . /code
-WORKDIR /code
-
-RUN go build http.go
-
-FROM microsoft/nanoserver:1709
-
-COPY --from=build /code/http.exe /http.exe
-
-EXPOSE 8080
-
-CMD ["\\http.exe"]

Dockerfile.insider

@@ -1,14 +0,0 @@
-FROM stefanscherer/golang-windows:1.9-insider AS build
-
-COPY . /code
-WORKDIR /code
-
-RUN go build http.go
-
-FROM microsoft/nanoserver-insider
-
-COPY --from=build /code/http.exe /http.exe
-
-EXPOSE 8080
-
-CMD ["\\http.exe"]