docker-compose.yaml : disabled pulling for custom images

cpp/docker-compose.yaml

@@ -1,6 +1,7 @@
 services:
   violajones-cpp:
     image: saundersp/violajones-cpp
+    pull_policy: never
     build: .
     volumes:
       - ./models:/home/ViolaJones/cpp/models

downloader/docker-compose.yaml

@@ -1,6 +1,7 @@
 services:
   downloader:
     image: saundersp/violajones-downloader
+    pull_policy: never
     build: .
     volumes:
       - ../data:/home/ViolaJones/data

python/docker-compose.yaml

@@ -1,6 +1,7 @@
 services:
   violajones-python:
     image: saundersp/violajones-python
+    pull_policy: never
     build: .
     volumes:
       - ./models:/home/ViolaJones/python/models