Updated flag embedding

embedding-extractors/flag_embedding/README.md

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+# Flag Embedding extractor (BGE)
+
+This extracctor uses FlagEmbedding that can map any text to a low-dimensional dense vector which can be used for tasks like retrieval, classification, clustering, or semantic search. It uses [BGE base model](https://huggingface.co/BAAI/bge-base-en) from [HuggingFace](https://huggingface.co/).
+
+Example input:
+
+```text
+The quick brown fox jumps over the lazy dog.
+```
+
+Example output:
+
+```json
+{
+    "embedding": [
+            510.3,
+            240.2,
+            ...
+    ]
+}
+```
+
+## Usage
+
+Try out the extractor. Write your favorite (foreign) quote.
+
+```bash
+cd flag_embedding
+indexify extractor extract --text "The quick brown fox jumps over the lazy dog."
+```
+
+## Container
+
+* The container is not published yet. *
+
+```bash
+docker run  -it indexify-extractors/flag_embedding extractor extract --text "The quick brown fox jumps over the lazy dog."
+```