Add dummy-emitter

(not functioning in current state)

emitter/Dockerfile

@@ -0,0 +1,6 @@
+FROM python
+WORKDIR /emitter
+COPY ./emitter.py ./
+ENTRYPOINT emitter.py
+
+LABEL name="emitter"

emitter/emitter.py

@@ -0,0 +1,13 @@
+from pymongo import MongoClient
+from bson.objectid import ObjectId
+from time import sleep
+
+MONGO_URI="mongodb://127.0.0.1:27017"
+
+client = MongoClient(MONGO_URI)
+db = client['default']
+col = db['eventlog']
+
+while True:
+    col.insertOne({"foo": "bar"})
+    sleep(1)