ERROR: database "template0" is not currently accepting connectionsFATAL: database "template0" can only be updated by autovacuum worker processes

  db:    image: postgres    restart: always    environment:      POSTGRES_USER: postgres      POSTGRES_PASSWORD: postgres      POSTGRES_DB: postgres    ports:      - "5432:5432"    volumes:      - ./init.sql:/docker-entrypoint-initdb.d/init.sql      - database_data:/var/lib/postgresql/data

-- Create the EC2 Fleet Instance Management tableCREATE TABLE IF NOT EXISTS ec2_fleet_instance_management (    fleet_id VARCHAR PRIMARY KEY,    instance_id VARCHAR,    state VARCHAR,    requested_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,    fleet_group VARCHAR,    instance_detail JSONB,    instance_status VARCHAR,    system_status VARCHAR,    llm_status VARCHAR,    public_ip_address VARCHAR);-- Create the Request History tableCREATE TABLE IF NOT EXISTS request_history (    request_id VARCHAR PRIMARY KEY,    instance_handled VARCHAR,    request_details JSONB,    response_details JSONB,    requested_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,    request_type VARCHAR,    instance_detail JSONB,    status_code VARCHAR,    public_ip_address VARCHAR);-- Indexes for the EC2 Fleet Instance Management table for quicker searchCREATE INDEX IF NOT EXISTS idx_ec2_fleet_instance_management_on_fleet_group ON ec2_fleet_instance_management (fleet_group);CREATE INDEX IF NOT EXISTS idx_ec2_fleet_instance_management_on_state ON ec2_fleet_instance_management (state);-- Indexes for the Request History table for quicker searchCREATE INDEX IF NOT EXISTS idx_request_history_on_request_type ON request_history (request_type);CREATE INDEX IF NOT EXISTS idx_request_history_on_requested_at ON request_history (requested_at);

def get_db_connection():    conn = psycopg2.connect(        dbname="postgres",        user="postgres",        password="*****",        host="db",        port="5432"    )    return conn