Improve docker build to use hooks

Makefile

@@ -73,12 +73,6 @@ sql:
 	@ grep -v "SET idle_in_transaction_session_timeout = 0;" app/Schema/Sql/postgres.sql > temp && mv temp app/Schema/Sql/postgres.sql
 
 docker-image:
-	@ docker build -t kanboard/kanboard:latest .
-
-docker-push:
-	@ docker push kanboard/kanboard:latest
-
-docker-run:
-	@ docker run -d --name kanboard -p 80:80 -t kanboard/kanboard:latest
+	@ IMAGE_NAME=kanboard/kanboard:latest ./hooks/build
 
 .PHONY: all