Add Stackdriver Profiler Python agent (#176)

* Add Stackdriver Profiler Python agent to EmailService and
RecommendationService

* Update recommendation_server.py

* Moved Profiler init to a function

* Moved Profiler init to a function

* Delete key.json

* Delete key.json

* Delete key.json

src/emailservice/Dockerfile

@@ -2,12 +2,16 @@ FROM python:3-slim as base
 
 FROM base as builder
 
+RUN apt-get -qq update \
+    && apt-get install -y --no-install-recommends \
+        g++ \
+    && rm -rf /var/lib/apt/lists/*
+
 # get packages
 COPY requirements.txt .
 RUN pip install -r requirements.txt
 
 FROM base as final
-
 # Enable unbuffered logging
 ENV PYTHONUNBUFFERED=1