add Pinecone Readme

server/utils/vectorDbProviders/pinecone/PINECONE_SETUP.md

+# How to setup Pinecone Vector Database for AnythingLLM
+
+[Official Pinecone Docs](https://docs.pinecone.io/docs/overview) for reference.
+
+### How to get started
+
+**Requirements**
+- Pinecone account (free or paid)
+
+**Instructions**
+- Create an index on your Pinecone account. Name can be anything eg: `my-primary-index`
+- Metric `cosine`
+- Dimensions `1536` since we use OpenAI for embeddings
+- 1 pod, all other default settings are fine.
+
+```
+VECTOR_DB="pinecone"
+PINECONE_ENVIRONMENT=us-west4-gcp-free
+PINECONE_API_KEY=sklive-123xyz
+PINECONE_INDEX=my-primary-index # the value from the first instruction!
+```