Update node version for fastify (#6477)

frameworks/JavaScript/fastify/fastify-mysql.dockerfile

@@ -1,4 +1,4 @@
-FROM node:14.15.5-slim
+FROM node:14.16.0-slim
 
 COPY ./ ./
 

frameworks/JavaScript/fastify/fastify-postgres.dockerfile

@@ -1,4 +1,4 @@
-FROM node:14.15.5-slim
+FROM node:14.16.0-slim
 
 COPY ./ ./
 

frameworks/JavaScript/fastify/fastify.dockerfile

@@ -1,4 +1,4 @@
-FROM node:14.15.5-slim
+FROM node:14.16.0-slim
 
 COPY ./ ./