Add standard Dockerfile

Build is likely correct but mostly added so docker-ember picks up the right
version.

Author: madnificent

Dockerfile

@@ -0,0 +1,14 @@
+FROM madnificent/ember:3.15.1
+
+LABEL maintainer="[email protected]"
+
+WORKDIR /app
+COPY package.json .
+RUN npm install
+COPY . .
+# RUN npx update-browserslist-db@latest
+RUN ember build -prod
+
+FROM semtech/static-file-service:0.2.0
+
+COPY --from=builder /app/dist /data