Update sass and docker (#1792)

* Update sass and docker

* update lock file

* Add change log

* bump minimum node

* revert node

Author: cbaker6

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Add multi-factor authentication to dashboard login. To use one-time password, run `parse-dashboard --createMFA` or `parse-dashboard --createUser`. (Daniel Blyth) [#1624](https://github.com/parse-community/parse-dashboard/pull/1624)
 
 ## Improvements
+- Update sass to 5.0.0 and make docker image use node:lts-alpine (Corey Baker) [#1792](https://github.com/parse-community/parse-dashboard/pull/1792)
 - Docker image use now node 12 version [#1788](https://github.com/parse-community/parse-dashboard/pull/1788)
 - CI now pushes docker images to Docker Hub (Corey Baker) [#1781](https://github.com/parse-community/parse-dashboard/pull/1781)
 - Add CI check to add changelog entry (Manuel Trezza) [#1764](https://github.com/parse-community/parse-dashboard/pull/1764)

Dockerfile

@@ -1,6 +1,6 @@
 #
 # --- Base Node Image ---
-FROM node:12-alpine AS base
+FROM node:lts-alpine AS base
 
 RUN apk update; \
   apk add git;
@@ -23,7 +23,7 @@ RUN npm run prepare && npm run build
 
 #
 # --- Production Image ---
-FROM node:12-alpine AS release
+FROM node:lts-alpine AS release
 WORKDIR /src
 
 # Copy production node_modules