Add a couple of minor notes

README.md

@@ -90,3 +90,17 @@ To search for something:
 ```shell
 sbkm search Mistral fine tuning
 ```
+
+
+## Technical notes
+
+There are a couple of interesting / new things in this tool, that
+might be worth pointing out so I can salvage those useful bits of code
+in the future:
+
+* it's using [Bleve's vector search
+  support](https://github.com/blevesearch/bleve/blob/master/docs/vectors.md)
+
+* it computes vector embeddings with *llama.cpp* using [custom Go
+  bindings](index/llamacpp/README.md) built for this purpose, so we
+  can run SBERT models without the overhead of a Python environment.