Add filter, add READMES

anzograph/README.md

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+# AnzoGraph (Docker Compose service)
+
+This repo runs AnzoGraph as an external container image:
+
+- Image: `cambridgesemantics/anzograph:latest`
+- Ports: `8080` (HTTP), `8443` (HTTPS)
+- Volume: `./data → /opt/shared-files`
+
+The backend connects to AnzoGraph via:
+
+- `SPARQL_HOST` (default `http://anzograph:8080`) and the `/sparql` path, or
+- an explicit `SPARQL_ENDPOINT`
+
+## Loading data
+
+The backend can optionally load a TTL file on startup (after AnzoGraph is ready):
+
+- `SPARQL_LOAD_ON_START=true`
+- `SPARQL_DATA_FILE=file:///opt/shared-files/<file>.ttl`
+
+Because `./data` is mounted at `/opt/shared-files`, anything placed in `./data` is accessible via a `file:///opt/shared-files/...` URI.
+
+## Notes
+
+- Authentication defaults are configured via the backend env (`SPARQL_USER` / `SPARQL_PASS`).
+- The AnzoGraph container in this repo is not customized; consult the upstream image documentation for persistence, licensing, and advanced configuration.
+