Use a manifest file to install dependencies

jfahrer · jfahrer · commit 5519300aae59 · 2018-05-04T18:49:39.000-07:00
[refs #44712567f522]
diff --git a/developing/webapp/Dockerfile b/developing/webapp/Dockerfile
@@ -2,9 +2,12 @@ FROM ruby:2.4.3-alpine
 
 WORKDIR /app
 
-RUN apk update && apk add build-base postgresql-dev
-RUN gem install sinatra pg
+RUN apk add --no-cache \
+      build-base \
+      postgresql-dev
 
-COPY app.rb .
+COPY . .
+
+RUN bundle install
 
 CMD ["ruby", "app.rb"]
diff --git a/developing/webapp/Gemfile b/developing/webapp/Gemfile
@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'sinatra', '2.0'
+gem 'pg', '1.0.0'
+
