Bind the server to 0.0.0.0 to allow exporting our exposed port.

Dockerfile

@@ -6,8 +6,10 @@ COPY wheeldir /opt/app/wheeldir
 # These are copied and installed first in order to take maximum advantage
 # of Docker layer caching (if enabled).
 COPY *requirements.txt /opt/app/src/
-RUN pip install --use-wheel --no-index --find-links=/opt/app/wheeldir -r /opt/app/src/requirements.txt
-RUN pip install --use-wheel --no-index --find-links=/opt/app/wheeldir -r /opt/app/src/test-requirements.txt
+RUN pip install --use-wheel --no-index --find-links=/opt/app/wheeldir \
+    -r /opt/app/src/requirements.txt
+RUN pip install --use-wheel --no-index --find-links=/opt/app/wheeldir \
+    -r /opt/app/src/test-requirements.txt
 
 COPY . /opt/app/src/
 WORKDIR /opt/app/src

dronedemo/main.py

@@ -8,4 +8,4 @@ def hello():
 
 
 if __name__ == "__main__":
-    app.run()
+    app.run(host='0.0.0.0', port=5000)