Use Elasticsearch configuration file to avoid tricky environment vari…

…able names

It appears that there is no way to pass allow-origin as an environment variable, as ES will not recognise the same option with an underscore, and provides no method to map hyphens. The configuration file is much more searchable against the docs anyway.

docker-compose.yml

@@ -94,8 +94,12 @@ services:
     image: docker.elastic.co/elasticsearch/elasticsearch:8.8.2
     ports:
       - "50292:9200"
-    env_file:
-      - docker/es/env.docker
+    environment:
+      # Elasticsearch will reserve 50-60% of available system memory
+      # if left to its own devices. Setting this to half a GB is sufficient
+      # for local testing and prevent ES from hogging such a significant
+      # amount of system memory.
+      ES_JAVA_OPTS: "-Xms512m -Xmx512m"
     healthcheck:
       test:
         [
@@ -111,6 +115,7 @@ services:
         hard: 65536
     volumes:
       - es-data:/usr/share/elasticsearch/data
+      - ./docker/es/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
 
 volumes:
   api-postgres:

docker/es/elasticsearch.yml

@@ -0,0 +1,12 @@
+# Disable XPack
+# https://www.elastic.co/guide/en/elasticsearch/reference/5.3/docker.html#_security_note
+xpack.security.enabled: false
+
+discovery.type: single-node
+
+network.host: 0.0.0.0
+network.bind_host: 0.0.0.0
+network.publish_host: 0.0.0.0
+
+http.cors.enabled: true
+http.cors.allow-origin: "/.*/"