Add Dockerfile.spot (Azure#6716)

Dockerfile.spot

@@ -0,0 +1,45 @@
+#---------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+#---------------------------------------------------------------------------------------------
+
+# Dockerfile used by VS Code Spot extension. (https://marketplace.visualstudio.com/items?itemName=derek-bekoe.Spot)
+# This allows Spots to be created directly from PRs.
+# The major difference between Dockerfile.spot and Dockerfile is the latter depends on alpine and this one does not.
+
+FROM python:3.6.4
+
+ENV JP_VERSION="0.1.3"
+
+WORKDIR azure-cli
+COPY . /azure-cli
+
+# bash gcc make openssl-dev libffi-dev musl-dev - dependencies required for CLI
+# openssh - included for ssh-keygen
+# ca-certificates
+
+# curl - required for installing jp
+# pip wheel - required for CLI packaging
+# jmespath-terminal - we include jpterm as a useful tool
+# 1. Build packages and store in tmp dir
+# 2. Install the cli and the other command modules that weren't included
+# 3. Temporary fix - install azure-nspkg to remove import of pkg_resources in azure/__init__.py (to improve performance)
+RUN apt-get install -y ca-certificates curl openssl git \
+ && apt-get install -y gcc make libffi-dev \
+ && update-ca-certificates \
+ && curl https://github.com/jmespath/jp/releases/download/${JP_VERSION}/jp-linux-amd64 -o /usr/local/bin/jp \
+ && chmod +x /usr/local/bin/jp \
+ && pip install --no-cache-dir --upgrade jmespath-terminal \
+ && /bin/bash -c 'TMP_PKG_DIR=$(mktemp -d); \
+    for d in src/azure-cli src/azure-cli-core src/azure-cli-nspkg src/azure-cli-command_modules-nspkg src/command_modules/azure-cli-*/; \
+    do cd $d; echo $d; python setup.py bdist_wheel -d $TMP_PKG_DIR; cd -; \
+    done; \
+    [ -d privates ] && cp privates/*.whl $TMP_PKG_DIR; \
+    all_modules=`find $TMP_PKG_DIR -name "*.whl"`; \
+    pip install --no-cache-dir $all_modules; \
+    pip install --no-cache-dir --force-reinstall --upgrade azure-nspkg azure-mgmt-nspkg;' \
+ && cat /azure-cli/az.completion > ~/.bashrc
+
+WORKDIR /
+
+CMD bash