Merge pull request #545 from coralproject/docker-fix

Fixed Dockerfile for regression with yarn

Dockerfile

@@ -13,7 +13,8 @@ EXPOSE 5000
 COPY . /usr/src/app
 
 # Install app dependencies and build static assets.
-RUN yarn install --frozen-lockfile && \
+RUN yarn global add node-gyp && \
+    yarn install --frozen-lockfile && \
     cli plugins reconcile && \
     yarn build && \
     yarn install --production && \