Added tailscale images

Change-Id: Ia7455c90222e26870f19d82338419c83b0dc5b58

tailscale/Dockerfile

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+# Copyright (c) 2020 VEXXHOST, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+FROM debian:10-slim
+
+ARG VERSION=1.0.4
+
+RUN apt-get update && \
+    apt-get -y install ca-certificates && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY tailscale.list /etc/apt/sources.list.d/
+COPY tailscale.gpg /etc/apt/trusted.gpg.d/tailscale.gpg
+
+RUN apt-get update && \
+    apt-get -y install tailscale=${VERSION} && \
+    rm -rfv /var/lib/apt/
+
+ENTRYPOINT ["/usr/sbin/tailscaled"]

tailscale/tailscale.list

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+# Tailscale packages for debian buster
+deb https://pkgs.tailscale.com/stable/debian buster main

zuul.d/tailscale.yaml

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+- job:
+    name: docker-images:build:tailscale
+    parent: vexxhost-build-docker-image
+    provides: docker-images:image:tailscale
+    vars: &id001
+      docker_images:
+      - context: tailscale/
+        repository: vexxhost/tailscale
+        arch:
+        - linux/amd64
+        - linux/arm64
+    files: &id002
+    - ^tailscale/.*
+- job:
+    name: docker-images:upload:tailscale
+    parent: vexxhost-upload-docker-image
+    provides: docker-images:image:tailscale
+    vars: *id001
+    files: *id002
+- job:
+    name: docker-images:promote:tailscale
+    parent: vexxhost-promote-docker-image
+    vars: *id001
+    files: *id002
+- project:
+    check:
+      jobs:
+      - docker-images:build:tailscale
+    gate:
+      jobs:
+      - docker-images:upload:tailscale
+    promote:
+      jobs:
+      - docker-images:promote:tailscale