Switch to using click in runworker.py`

runworker.py

@@ -5,19 +5,31 @@
 import os
 from pathlib import Path
 
+import click
 from celery.bin import worker
 
 from trendlines.celery_factory import create_celery
 
-# Load our configuration. We're using pathlib and `.resolve()` because
-# Flask's working dir is src/trendlines and uses that when running
-# `app.config.from_envvar`, so the path it attemps to load is
-# `/proj_folder/src/trendlines/config/localhost.cfg` if `cfg_file` is not
-# absolute.
-cfg_file = Path('./config/localhost.cfg')
-os.environ['TRENDLINES_CONFIG_FILE'] = str(cfg_file.resolve())
-
-#  app.worker_main()
-celery = create_celery()
-worker = worker.worker(app=celery)
-worker.run()
+
+def runworker():
+    # Load our configuration. We're using pathlib and `.resolve()` because
+    # Flask's working dir is src/trendlines and uses that when running
+    # `app.config.from_envvar`, so the path it attemps to load is
+    # `/proj_folder/src/trendlines/config/localhost.cfg` if `cfg_file` is not
+    # absolute.
+    cfg_file = Path('./config/localhost.cfg')
+    os.environ['TRENDLINES_CONFIG_FILE'] = str(cfg_file.resolve())
+
+    #  app.worker_main()
+    celery = create_celery()
+    this_worker = worker.worker(app=celery)
+    this_worker.run()
+
+
+@click.command()
+def main():
+    runworker()
+
+
+if __name__ == "__main__":
+    main()