Add dockerfile and explanaition in how to use it

avdi · Dec 21, 2019 · a84c550 · a84c550
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diff --git a/Dockerfile b/Dockerfile
@@ -0,0 +1,10 @@
+FROM ruby:1.9
+
+COPY Gemfile /app/Gemfile
+COPY Gemfile.lock /app/Gemfile.lock
+
+WORKDIR /app
+
+RUN bundle install
+
+CMD ["sh", "-c", "bundle exec rails server"]
diff --git a/README.markdown b/README.markdown
@@ -3,6 +3,15 @@
 A community-maintained resource to encourage and facilitate diverse
 pair-programming. Help eagerly welcomed!
 
+# Contributing
+
+Building and running the app locally is easiest achieved by
+using [docker](https://docker.com).
+
+1. Build container using `docker build -t ppwm .`
+2. Run container via `docker run --rm -it "$(pwd):/app" -p 3000:3000 ppwm`
+3. Visit `localhost:3000` to see the app running
+
 # LICENSE
 
 Copyright (c) 2013 Avdi Grimm