Add Dockerfiles for Windows entrypoint and nop images

This change adds two new Dockerfiles under 'images/windows/'. These
can be used to build Windows images for the entrypoint and nop
binaries. Docker is used to build these images because Ko does
not currently support building for Windows.

Author: aiden-deloryn

images/windows/entrypoint/Dockerfile

@@ -0,0 +1,23 @@
+ARG BASE_IMAGE=mcr.microsoft.com/windows/nanoserver:1809
+
+FROM golang:1.16.4 AS builder
+
+COPY . c:/gopath/src/github.com/tektoncd/pipeline
+
+WORKDIR c:/gopath/src/github.com/tektoncd/pipeline
+
+RUN go build -o c:/gopath/bin/entrypoint.exe ./cmd/entrypoint
+
+FROM ${BASE_IMAGE}
+
+COPY --from=builder c:/gopath/bin/entrypoint.exe c:/ProgramData/tektoncd/pipeline/entrypoint.exe
+
+# Copy kodata into the image
+# NOTE: The COPY instruction does not follow symbolic links
+COPY ./.git/HEAD ./LICENSE c:/ProgramData/tektoncd/pipeline/data/
+
+COPY ./.git/refs c:/ProgramData/tektoncd/pipeline/data/refs/
+
+COPY ./third_party c:/ProgramData/tektoncd/pipeline/data/third-party/
+
+ENTRYPOINT ["c:/ProgramData/tektoncd/pipeline/entrypoint.exe"]

images/windows/nop/Dockerfile

@@ -0,0 +1,23 @@
+ARG BASE_IMAGE=mcr.microsoft.com/windows/nanoserver:1809
+
+FROM golang:1.16.4 AS builder
+
+COPY . c:/gopath/src/github.com/tektoncd/pipeline
+
+WORKDIR c:/gopath/src/github.com/tektoncd/pipeline
+
+RUN go build -o c:/gopath/bin/nop.exe ./cmd/nop
+
+FROM ${BASE_IMAGE}
+
+COPY --from=builder c:/gopath/bin/nop.exe c:/ProgramData/tektoncd/pipeline/nop.exe
+
+# Copy kodata into the image
+# NOTE: The COPY instruction does not follow symbolic links
+COPY ./.git/HEAD ./LICENSE c:/ProgramData/tektoncd/pipeline/data/
+
+COPY ./.git/refs c:/ProgramData/tektoncd/pipeline/data/refs/
+
+COPY ./third_party c:/ProgramData/tektoncd/pipeline/data/third-party/
+
+ENTRYPOINT ["c:/ProgramData/tektoncd/pipeline/nop.exe"]