Removed Yarn as a hard dependency. Replace it with a package-lock.json file.

Brian Cottingham · Brian Cottingham · commit 66917b7e0ffd · 2018-08-06T08:47:24.000-04:00
diff --git a/Dockerfile b/Dockerfile
@@ -1,11 +1,9 @@
 FROM node:10
 
-RUN npm install yarn
-
 WORKDIR /app
 ADD package.json /app/package.json
-ADD yarn.lock /app/yarn.lock
-RUN yarn install
+ADD package-lock.json /app/package-lock.json
+RUN npm install
 
 ADD . /app
 
diff --git a/README.md b/README.md
@@ -13,8 +13,7 @@ crossorigin.me is a CORS proxy. It lets developers (like you!) access resources
 # Building
 
 ```
-npm install -g yarn
-yarn install
+npm install
 npm start
 ```
 
diff --git a/package-lock.json b/package-lock.json
