Fix Docker setup

Author: julienrf

Dockerfile

@@ -0,0 +1,12 @@
+FROM ruby:2.5
+
+RUN gem install bundler jekyll
+
+RUN mkdir /srv/jekyll
+
+WORKDIR /srv/jekyll
+
+COPY Gemfile .
+COPY Gemfile.lock .
+
+RUN bundle install

bin/serve

@@ -1,3 +1,3 @@
 #!/bin/bash
 command -v docker-compose >/dev/null 2>&1 || { echo >&2 "Please install Docker Compose: https://docs.docker.com/compose/install/"; exit 1; }
-docker-compose run --service-ports scala-lang jekyll serve --incremental
+docker-compose up

docker-compose.yml

@@ -1,12 +1,9 @@
 version: "2"
 services:
   scala-lang:
-    image: jekyll/jekyll:latest
-    volumes:
-      - $PWD:/srv/jekyll
-      - $PWD/vendor/bundle:/usr/local/bundle
+    build: .
+    command: bundle exec jekyll serve --incremental --host=0.0.0.0
     ports:
       - 4000:4000
-      - 35729:35729
-      - 3000:3000
-      - 80:4000
+    volumes:
+      - .:/srv/jekyll