Data not written to the specified pgvector database with the developer RAG

[Frank-Che]

Steps to reproduce:

1. In compose.env, set POSTGRES_PASSWORD=password; POSTGRES_USER=postgres; POSTGRES_DB=mydb.
2. Start the developer RAG with docker-compose-pgvector.yaml
3. On the developer RAG UI, swith to the 'kb' page, click 'Add file' to upload a pdf file.
4. Connect to the created pgvector database with UI tools like 'pgAdmin'. Check the vector data written to the database.

Problem description: vector data was not written to the user speicified database 'mydb', but written to another database named 'vector_db'. And it seems the name 'vector_db' is hard-coded.

Expected result: vector data should be written to the database user specified in the compose.env file.

[nv-pranjald]

Thanks @Frank-Che for opening the issue.
As you mentioned database name was hardcoded to vector_db. Now we're taking this value from environment variable POSTGRES_DB.