tech(docker): add elastic fig

docker/blocks/elastic/elasticsearch/config/.placeholder

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+Ensure the existence of the parent folder.

docker/blocks/elastic/fig

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+elasticsearch:
+  image: elasticsearch:latest
+  command: elasticsearch -Des.network.host=0.0.0.0
+  ports:
+    - "9200:9200"
+    - "9300:9300"