Add OpenFaaS Clear Linux based python3 template

Signed-off-by: Qi Zheng <qi.zheng@intel.com>

FaaS/OpenFaaS/template/python3-clearlinux/Dockerfile

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+FROM openfaas/classic-watchdog:0.18.1 as watchdog
+
+FROM clearlinux/python:3
+
+ARG swupd_args
+
+COPY --from=watchdog /fwatchdog /usr/bin/fwatchdog
+RUN chmod +x /usr/bin/fwatchdog
+
+WORKDIR /root/
+
+COPY index.py           .
+# pip install python packages if required
+COPY requirements.txt   .
+RUN pip install -r requirements.txt
+
+# install bundles if required
+# PLEASE input bundle line by line
+COPY bundles.txt  .
+RUN for bundle in $(cat bundles.txt); do \
+        swupd bundle-add $bundle $swupd_args; \
+    done
+
+RUN mkdir -p function
+RUN touch ./function/__init__.py
+WORKDIR /root/function/
+# pip install python packages if required
+COPY function/requirements.txt  .
+RUN pip install -r requirements.txt
+
+# install bundles if required
+# PLEASE input bundle line by line
+COPY function/bundles.txt  .
+RUN for bundle in $(cat bundles.txt); do \
+        swupd bundle-add $bundle $swupd_args; \
+    done
+
+WORKDIR /root/
+COPY function           function
+
+ENV fprocess="python3 index.py"
+EXPOSE 8080
+
+HEALTHCHECK --interval=3s CMD [ -e /tmp/.lock ] || exit 1
+
+CMD ["fwatchdog"]

FaaS/OpenFaaS/template/python3-clearlinux/function/handler.py

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+def handle(req):
+    """handle a request to the function
+    Args:
+        req (str): request body
+    """
+
+    return req

FaaS/OpenFaaS/template/python3-clearlinux/index.py

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+# Copyright (c) Alex Ellis 2017. All rights reserved.
+# Copyright (c) OpenFaaS Author(s) 2018. All rights reserved.
+# Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+import sys
+from function import handler
+
+def get_stdin():
+    buf = ""
+    while(True):
+        line = sys.stdin.readline()
+        buf += line
+        if line == "":
+            break
+    return buf
+
+if __name__ == "__main__":
+    st = get_stdin()
+    ret = handler.handle(st)
+    if ret != None:
+        print(ret)

FaaS/OpenFaaS/template/python3-clearlinux/template.yml

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+language: python3
+fprocess: python3 index.py