Hugging Face Text Embeddings Inference (TEI) is a toolkit for deploying and serving open-source text embeddings and sequence classification models. TEI enables high-performance extraction for the most popular models, including FlagEmbedding, Ember, GTE and E5.
To use it within langchain, first install huggingface-hub. 
%pip install --upgrade huggingface-hub
Then expose an embedding model using TEI. For instance, using Docker, you can serve BAAI/bge-large-en-v1.5 as follows: 
model=BAAI/bge-large-en-v1.5
revision=refs/pr/5
volume=$PWD/data # share a volume with the Docker container to avoid downloading weights every run

docker run --gpus all -p 8080:80 -v $volume:/data --pull always ghcr.io/huggingface/text-embeddings-inference:0.6 --model-id $model --revision $revision
Specifics on Docker usage might vary with the underlying hardware. For example, to serve the model on Intel Gaudi/Gaudi2 hardware, refer to the tei-gaudi repository for the relevant docker run command. Finally, instantiate the client and embed your texts. 
from langchain_huggingface.embeddings import HuggingFaceEndpointEmbeddings

embeddings = HuggingFaceEndpointEmbeddings(model="http://localhost:8080")

text = "What is deep learning?"

query_result = embeddings.embed_query(text)
query_result[:3]

[0.018113142, 0.00302585, -0.049911194]

doc_result = embeddings.embed_documents([text])

doc_result[0][:3]

[0.018113142, 0.00302585, -0.049911194]