Docker file added and readme updated

.dockerignore

@@ -0,0 +1,7 @@
+.git
+.git/
+.gitignore
+_site
+.sass-cache
+.DS_Store
+_vendor

Dockerfile

@@ -0,0 +1,11 @@
+FROM ruby:2.7
+
+WORKDIR /home/app
+
+COPY Gemfile* ./
+
+RUN bundle install
+
+COPY . .
+
+CMD [ "bundle", "exec", "jekyll", "serve" ]

README.md

@@ -15,6 +15,13 @@ To test locally, run the following in your terminal:
 2. `bundle exec jekyll serve`
 3. Open your browser to `localhost:4000`
 
+### Running locally with Docker
+
+To test locally with docker, run the following in your terminal after installing docker into your system:
+
+1. `docker image build -t resume-template .`
+2. `docker run --rm --name resume-template -v "$PWD":/home/app --network host resume-template`
+
 ### Customizing
 
 First you'll want to fork the repo to your own account. Then clone it locally and customize, or use the GitHub web editor to customize.