Try to set up project for AWS deploy

Make the entry-point file runnable so AWS can run the Flask app.

For:
#8

.ebignore

@@ -0,0 +1,4 @@
+.coverage
+.mypy_cache
+.pytest_cache
+__pycache__

.gitignore

@@ -1,3 +1,7 @@
+!.elasticbeanstalk/*.cfg.yml
+!.elasticbeanstalk/*.global.yml
+.elasticbeanstalk/*
+
 .coverage
 .mypy_cache
 .pytest_cache

src/app.py

@@ -13,3 +13,8 @@
 def hello_world():
     """A cheeky hello world route."""
     return {"message": "Look on my Affiliations Service, ye Mighty, and despair!"}
+
+
+if __name__ == "__main__":
+    # I believe this is needed for running on AWS.
+    app.run()