add dockerfile

Dockerfile

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+FROM node:11.13.0-alpine
+
+# create destination directory
+RUN mkdir -p /usr/src/nuxt-app
+WORKDIR /usr/src/nuxt-app
+
+# update and install dependency
+RUN apk update && apk upgrade
+RUN apk add git
+
+# copy the app, note .dockerignore
+COPY . /usr/src/nuxt-app/
+RUN npm install
+
+# build necessary, even if no static files are needed,
+# since it builds the server as well
+RUN npm run build
+
+# expose 5000 on container
+EXPOSE 5000
+
+# set app serving to permissive / assigned
+ENV NUXT_HOST=0.0.0.0
+# set app port
+ENV NUXT_PORT=5000
+
+# start the app
+CMD [ "npm", "start" ]