Added missing requirements

Makefile

@@ -155,6 +155,9 @@ install_translation:
 	cd services/translation; python3 setup.py install
 
 install_nsfw:
+	python3 -m pip install opencv-python
+	python3 -m pip install scikit-image
+	python3 -m pip install pydload
 	cd services/nsfw_detection; python3 setup.py install
 
 install_ping:

services/ping_service/coffeehouse_ping/server.py

@@ -14,6 +14,7 @@ class Server(object):
         self.web_application = web.Application()
         self.web_application.add_routes(
             [web.post('/', self.ping)]
+            [web.get('/', self.ping)]
         )
 
     async def ping(self, request):