Switch to node 8 and add lock file

.circleci/config.yml

@@ -3,7 +3,7 @@ version: 2.0
 jobs:
     build:
         docker:
-            - image: circleci/node:6.10
+            - image: circleci/node:8.10
         environment:
             - npm_config_loglevel: notice
         steps:
@@ -12,12 +12,12 @@ jobs:
                 name: Install Hugo
                 command: wget https://github.com/gohugoio/hugo/releases/download/v0.36/hugo_0.36_Linux-64bit.deb -O /tmp/hugo.deb && sudo dpkg -i /tmp/hugo.deb
             - restore_cache:
-                key: npm-{{ checksum "package.json" }}
+                key: npm-{{ checksum "package-lock.json" }}
             - run:
                 name: Install dependencies
                 command: npm install
             - save_cache:
-                key: npm-{{ checksum "package.json" }}
+                key: npm-{{ checksum "package-lock.json" }}
                 paths:
                 - node_modules
             - run:

package.json

@@ -8,6 +8,9 @@
     "type": "git",
     "url": "git@github:RealOrangeOne/theorangeone.net"
   },
+  "engine": {
+    "node": "8.10.0"
+  },
   "author": "Jake Howard <git@theorangeone.net>",
   "devDependencies": {
     "broken-link-checker-local": "0.1.1",