copy print folder on dockerfile build

Dockerfile

@@ -18,12 +18,14 @@ RUN apt-get update \
 WORKDIR /salix
 COPY package.json package-lock.json ./
 COPY loopback/package.json loopback/
+COPY print/package.json print/
 RUN npm install --only=prod
 
 COPY loopback loopback
 COPY back back
 COPY modules modules
 COPY dist/webpack-assets.json dist/
+COPY print print
 COPY \
     modules.yml \
     LICENSE \

loopback/server/boot/print.js

@@ -1,3 +1,3 @@
 module.exports = function(app) {
-    require('../../../services/print/server.js')(app);
+    require('../../../print/server.js')(app);
 };