update Dockerfile

bbb-webhooks/Dockerfile

 FROM node:8-slim
 
-ADD . app
-
-WORKDIR app
+ENV NODE_ENV production
 
-RUN cp config_local.js.example config_local.js
+WORKDIR /app
 
-ENV NODE_ENV production
+ADD package.json package-lock.json /app/
 
 RUN npm install \
  && npm cache clear --force
 
+ADD . /app
+
+RUN cp config/default.example.yml config/default.yml
+
 EXPOSE 3005
 
 CMD ["node", "app.js"]