[Docker] Install gems and js packages into the image

To see the changes persisted into the container run `docker-compose` build
`docker-compose down -v` no longer requires to reinstall gems/packages
It's also possible to have branches with different gemfiles, without having
to install between them constantly

.dockerignore

@@ -0,0 +1,8 @@
+# Ignore everything
+**
+
+# Allow only the files that are actually needed
+!/package.json
+!/yarn.lock
+!/Gemfile
+!/Gemfile.lock

Dockerfile

@@ -4,10 +4,16 @@ FROM ruby:2.7.3-alpine
 RUN apk --no-cache add nodejs yarn postgresql-client ffmpeg vips tzdata \
   git build-base postgresql-dev glib-dev
 
-
 # Nice to have packages
 RUN apk --no-cache add nano sudo bash
 
+# Install js packages and gems
+COPY package.json yarn.lock ./
+RUN yarn install
+
+COPY Gemfile Gemfile.lock ./
+RUN bundle install
+
 # shoreman
 RUN wget -O /usr/bin/shoreman https://github.com/chrismytton/shoreman/raw/master/shoreman.sh \
   && chmod +x /usr/bin/shoreman

README.md

@@ -27,6 +27,8 @@ To mitigate this you can install a WSL distribution and clone the project inside
 By the time you get back the install will surely have completed.<sup>1</sup>
 6. To confirm the installation worked, open the web browser of your choice and enter `http://localhost:3000` into the address bar and see if the website loads correctly.
 
+Note: When gems or js packages were updated you need to execute `docker-compose build` to reflect them in the container.
+
 <sub><sup>1</sup> If the install did not finish by the time an activity is complete please select another activity to avoid crippling boredom.</sub>
 
 #### Development Database

docker-compose.yml

@@ -2,14 +2,13 @@ version: "3"
 
 services:
   e621:
-    build: ./docker
+    build: ./
     volumes:
       - .:/app
       - node_modules:/app/node_modules
       - public_packs:/app/public/packs
       - public_packs_test:/app/public/packs-test
       - post_data:/app/public/data
-      - gems:/usr/local/bundle
     environment:
       DATABASE_URL: postgresql://danbooru:@postgres
       RAILS_ENV: development
@@ -76,7 +75,6 @@ volumes:
   elastic_data:
   db_data:
   redis_data:
-  gems:
   node_modules:
   public_packs:
   public_packs_test: