Update Dockerfile

Changes included in this PR
vuejs/vuejs/Dockerfile
We recommend upgrading to node:14.18.2-alpine, as this image has only 0 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
critical severity	500	Out-of-bounds Read
SNYK-ALPINE311-APKTOOLS-1534687	No Known Exploit
high severity	400	Improper Certificate Validation
SNYK-ALPINE311-OPENSSL-1089242	No Known Exploit
high severity	400	Out-of-bounds Read
SNYK-ALPINE311-OPENSSL-1569447	No Known Exploit
critical severity	500	Buffer Overflow
SNYK-ALPINE311-OPENSSL-1569451	No Known Exploit
critical severity	500	Buffer Overflow
SNYK-ALPINE311-OPENSSL-1569451	No Known Exploit

vuejs/vuejs/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:14.4.0-alpine
+FROM node:14.18.2-alpine
 
 RUN mkdir /project
 WORKDIR /project