fix: mount individual Netdata config files instead of directory

Changed from mounting entire go.d directory to mounting specific
config files (postgres.conf, filecheck.conf) to avoid conflicts
with Netdata's initialization script which needs to write to the
go.d directory during startup.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

netdata/compose.yaml

@@ -13,7 +13,8 @@ services:
       - netdata_config:/etc/netdata
       - netdata_lib:/var/lib/netdata
       - netdata_cache:/var/cache/netdata
-      - ./go.d:/etc/netdata/go.d:ro
+      - ./go.d/postgres.conf:/etc/netdata/go.d/postgres.conf:ro
+      - ./go.d/filecheck.conf:/etc/netdata/go.d/filecheck.conf:ro
       - /mnt/hidrive/users/valknar/Backup:/mnt/hidrive/users/valknar/Backup:ro
       - /etc/passwd:/host/etc/passwd:ro
       - /etc/group:/host/etc/group:ro