Use babel to minify and transpile

Signed-off-by: Knut Ahlers <knut@ahlers.me>

.babelrc

@@ -0,0 +1,20 @@
+{
+  "presets": [
+    [
+      "env",
+      {
+        "targets": {
+          "browsers": [
+            "last 3 versions",
+            "Safari >= 10",
+            "not ie <= 8",
+            "Edge >= 12",
+            "iOS >= 10",
+            "Android >= 4.4"
+          ]
+        }
+      }
+    ],
+    "minify"
+  ]
+}

.gitignore

@@ -1 +1,2 @@
+node_modules
 public

Makefile

@@ -3,9 +3,8 @@ default: generate
 generate: script index-page
 
 script: public
-	coffee --bare --compile --output public app.coffee
-	python -m jsmin public/app.js > public/app.min.js
-	mv public/app.min.js public/app.js
+	docker run --rm -ti -v $(CURDIR):$(CURDIR) -w $(CURDIR) node:alpine \
+		sh -exc "npm ci && npx coffee -t -c -o public/app.js app.coffee && chown -R $(shell id -u) public && rm -rf node_modules"
 
 index-page: public
 	./generate.py > public/index.html

package.json

@@ -0,0 +1,11 @@
+{
+  "name": "past3",
+  "version": "0.0.0",
+  "internal": true,
+  "devDependencies": {
+    "babel-core": "^6.26.3",
+    "babel-preset-env": "^1.7.0",
+    "babel-preset-minify": "^0.4.3",
+    "coffeescript": "^2.3.1"
+  }
+}