Update node Dockerfile tag to v8.9.4

renovate[bot] · fusion-bot[bot] · commit 6bf00f50b30a · 2018-01-11T00:36:16.000Z
#6
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:8.9.0@sha256:ae75ba3568f2c3d93b0952bd1a1888434bbd6e2ea8c907aa57836958be688cef
+FROM node:8.9.4@sha256:6054aa20c5b7d198524d9bd56c7b2d4fde046b6825e8261ccbf441444a5f4d39
 
 WORKDIR /probot-app-merge-pr
 

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-FROM node:8.9.0@sha256:ae75ba3568f2c3d93b0952bd1a1888434bbd6e2ea8c907aa57836958be688cef`
	`1`	`+FROM node:8.9.4@sha256:6054aa20c5b7d198524d9bd56c7b2d4fde046b6825e8261ccbf441444a5f4d39`
`2`	`2`
`3`	`3`	`WORKDIR /probot-app-merge-pr`
`4`	`4`