Add Elasticsearch to Docker Compose (#5978)

* Copy .ruby-version into Dockerfile
* Add Elasticsearch to Docker Compose

.gitignore

@@ -69,3 +69,6 @@ docs/.static/api/
 
 # asdf
 .tool-versions
+
+# ES docker volume
+docker_data/

docker-compose.yml

@@ -7,10 +7,12 @@ services:
     depends_on:
       - db
       - redis
+      - elasticsearch
     environment:
       RAILS_ENV: development
       DATABASE_URL: postgres://postgres:mysecretpassword@db:5432/postgres
       YARN_INTEGRITY_ENABLED: "false"
+      ELASTICSEARCH_URL: http://elasticsearch:9200
     volumes:
       - .:/usr/src/app
     command: bundle exec rails server -b 0.0.0.0 -p 3000
@@ -33,3 +35,23 @@ services:
     image: "redis"
     ports:
       - "6379:6379"
+  elasticsearch:
+    image: docker.elastic.co/elasticsearch/elasticsearch:7.5.2
+    container_name: elasticsearch
+    environment:
+      - cluster.name=docker-cluster
+      - bootstrap.memory_lock=true
+      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
+      - "discovery.type=single-node"
+      - xpack.security.enabled=false
+      - xpack.monitoring.enabled=false
+      - xpack.graph.enabled=false
+      - xpack.watcher.enabled=false
+    ulimits:
+      memlock:
+        soft: -1
+        hard: -1
+    volumes:
+        - ./docker_data/elasticsearch/data:/usr/share/elasticsearch/data
+    ports:
+      - "9200:9200"

docs/installation/docker.md

@@ -71,6 +71,7 @@ and start the container again_
 1. run `docker-compose build`
 1. run `docker-compose run web rails db:setup`
 1. run `docker-compose run web yarn`
+1. run `docker-compose run web rails search:setup`
 1. run `docker-compose up`
 1. That's it! Navigate to <http://localhost:3000>
 
@@ -84,3 +85,11 @@ Please execute the script itself to view all additional options:
 ```shell
 ./docker-run.sh
 ```
+
+## Known Problems & Solutions
+
+- Should you experience problems with the ElasticSearch container, try to
+  increase the memory and/or swap allocation for Docker. On macOS this can be
+  done via the GUI:
+
+  ![docker gui](https://user-images.githubusercontent.com/47985/74210448-b63b7c80-4c83-11ea-959b-02249b2a6952.png)