changed volume paths ; FLAT_NODES=enabled (#261)

Changes:
- /var/lib/postgresql/14/main/            => /data/database/
- /var/lib/mod_tile/                      => /data/tiles/
- /home/renderer/src/openstreetmap-carto/ => /data/style/
- /data.osm.pbf                           => /data/region.osm.pbf
- /data.poly                              => /data/region.poly
- /nodes/flat_nodes.bin                   => deprecated (use FLAT_NODES=enabled instead)

Because some files are needed later and should never be separated from the database, the import does save those files now into /data/databases/:
- /data/database/region.poly
- /data/database/flat_nodes.bin
- /data/database/planet-import-complete
- and automatic update artifacts

docker-compose.yml

@@ -4,11 +4,11 @@ services:
   map:
     image: overv/openstreetmap-tile-server
     volumes:
-      - openstreetmap-data:/var/lib/postgresql/14/main
+      - osm-data:/data/database/
     ports:
       - "8080:80"
     command: "run"
 
 volumes:
-  openstreetmap-data:
+  osm-data:
     external: true