travis CI tests for communities.json

.gitignore

@@ -1 +1,5 @@
 .DS_Store
+node_modules/
+yarn.lock
+package-lock.json
+*.log

.travis.yml

@@ -0,0 +1,3 @@
+language: node_js
+node_js:
+  - "lts/*"

package.json

@@ -1,5 +1,12 @@
 {
   "name": "discord-open-source",
   "version": "1.0.0",
-  "main": "communities.json"
+  "main": "communities.json",
+  "scripts": {
+    "test": "prettier -c communities.json || (npm run fmt && git diff && exit 1)",
+    "fmt": "prettier --write communities.json"
+  },
+  "devDependencies": {
+    "prettier": "^1.16.1"
+  }
 }