Use Elasticsearch configuration file to avoid tricky envvar names

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: "/.*/"