Enable running check-links locally with web3f/link-checker (polkadot-developers#594)

* Enable running check-links locally with web3f/link-checker

* update

Author: Jimmy Chu

Diff for: Dockerfile

@@ -1,7 +1,8 @@
 # Q: What is this dockerfile for?
 # A: https://docusaurus.io/docs/en/docker
 
-FROM node:8.11.4
+# Unify with our CI test image node version
+FROM node:10.15.2
 
 WORKDIR /app/website
 

Diff for: docker-compose.yml

@@ -1,7 +1,13 @@
 version: "3"
 
 services:
-  docusaurus:
+  link-checker:
+    image: web3f/link-checker:v1.0.1
+    command: /bin/bash -c "sleep 20 && linkchecker --ignore-url=\"^(?:(?!\/en\/).)*$$\" --check-extern http://main:3000/"
+    depends_on:
+      - main
+
+  main:
     build: .
     ports:
       - 3000:3000

Diff for: website/package.json

@@ -9,7 +9,8 @@
     "rename-version": "docusaurus-rename-version",
     "crowdin-upload": "crowdin --config ../crowdin.yaml upload sources --auto-update -b master",
     "crowdin-download": "crowdin --config ../crowdin.yaml download -b master",
-    "check-links": "yarn blc http://localhost:3000 -ro --exclude \"http://localhost:3000/docs/ru\" --exclude \"http://localhost:3000/docs/zh-CN\" --exclude \"https://playground.substrate.dev/\" --exclude \"https://player.twitch.tv/?channel=paritylivecoding\" --exclude \"http://localhost:8000/\""
+    "check-links": "yarn check-links-cleanup && docker-compose up",
+    "check-links-cleanup": "docker-compose down --remove-orphans"
   },
   "devDependencies": {
     "broken-link-checker": "^0.7.8",