fix: dockerfile in root folder

Author: DavidVujic

Dockerfile.examples

@@ -0,0 +1,13 @@
+FROM node:10
+
+WORKDIR /app
+
+COPY . /app
+
+RUN rm -rf build
+RUN rm -rf node_modules
+RUN rm -f package-lock.json
+
+RUN npm install --unsafe-perm
+
+CMD ["node", "examples/index", "host.docker.internal:2181"]