reduce docker layer size

CHANGELOG.md

@@ -8,7 +8,13 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ## [Unreleased]
  
 ### Added
+
+- default index.html for api without bundled ui
+
 ### Changed
+
+- minify containers to reduce layer size
+
 ### Fixed
 
 - bug in settings resolver with nullable fields

Dockerfile

@@ -3,6 +3,11 @@ MAINTAINER OhMyForm <admin@ohmyform.com>
 
 WORKDIR /usr/src/app
 
+RUN apk update && apk add curl bash && rm -rf /var/cache/apk/*
+
+# install node-prune (https://github.com/tj/node-prune)
+RUN curl -sfL https://install.goreleaser.com/github.com/tj/node-prune.sh | bash -s -- -b /usr/local/bin
+
 # just copy everhing
 COPY . .
 
@@ -11,6 +16,12 @@ RUN touch /usr/src/app/src/schema.gql && chown 9999:9999 /usr/src/app/src/schema
 RUN yarn install --frozen-lockfile
 RUN yarn build
 
+# remove development dependencies
+RUN npm prune --production
+
+# run node prune
+RUN /usr/local/bin/node-prune
+
 FROM node:12-alpine
 MAINTAINER OhMyForm <admin@ohmyform.com>
 
@@ -28,6 +39,7 @@ ENV PORT=3000 \
     ADMIN_USERNAME=root \
     ADMIN_PASSWORD=root
 
+
 EXPOSE 3000
 
 # Change to non-root privilege