Make environment ready for Docker

docker-compose.yml

@@ -3,11 +3,13 @@ version: "2"
 services:
   app:
     image: pathogen/neptune
-    build: .
+    build: ./docker
     volumes:
-      - .:/code
+      - ${PORTAINER_GIT_DIR}:/code
     ports:
-      - "8000:8000"
+      - "${NEPTUNE_PORT}:8000"
+    env_file:
+      - .env
 
 networks:
    default: