Update node

.node-version

-v16.2.0
+v16.6.2

CHANGELOG.md

+<!--
+## 12.x.x (unreleased)
+
+### Improvements
+
+### Bugfixes
+
+-->
+
+## 12.86.1 (2021/08/12)
+
+### Improvements
+- Docker: Node.jsを16.6.2に
+
 ## 12.86.0 (2021/08/11)
 
 ### Improvements

Dockerfile

-FROM node:16.2.0-alpine3.13 AS base
+FROM node:16.6.2-alpine3.13 AS base
 
 ENV NODE_ENV=production