Self-Hosted Main

I've got 2 servers on my local network: rasp pi, and an ubuntu vm. I'm trying to use nginx proxy manager with pihole DNS records to give tubearchivist an easier address to remember. Tubearchivist itself is working great using the below docker compose file. However, I can't access it through it's pihole dns record. It simply gives a "Bad Request (400)" error. I've tried using the 192.168.1.8 & yt_dl.stuff separately, together, and between quotes, but no luck. Furthermore, using nslookup, I can tell the yt_dl.stuff is pointing to the correct address. Any ideas on what might be configured wrong in my docker compose below? Thanks!

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version: '3.5'

services:
  tubearchivist:
    container_name: tubearchivist
    restart: unless-stopped
    image: bbilly1/tubearchivist
    ports:
      - 8000:8000
    volumes:
      - media:/youtube
      - cache:/cache
    environment:
      - ES_URL=http://archivist-es:9200     # needs protocol e.g. http and port
      - REDIS_HOST=archivist-redis          # don't add protocol
      - HOST_UID=1000
      - HOST_GID=1000
      - TA_HOST=192.168.1.8 yt_dl.stuff                # set your host name
      - TA_USERNAME=tubearchivist           # your initial TA credentials
      - TA_PASSWORD=verysecret              # your initial TA credentials
      - ELASTIC_PASSWORD=verysecret         # set password for Elasticsearch
      - TZ=America/Chicago                  # set your time zone

    depends_on:
      - archivist-es
      - archivist-redis
  archivist-redis:
    image: redis/redis-stack-server
    container_name: archivist-redis
    restart: unless-stopped
    expose:
      - "6379"
    volumes:
      - redis:/data
    depends_on:
      - archivist-es
  archivist-es:
    image: bbilly1/tubearchivist-es         # only for amd64, or use official es 8.9.0
    container_name: archivist-es
    restart: unless-stopped
    environment:
      - "ELASTIC_PASSWORD=verysecret"       # matching Elasticsearch password
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "xpack.security.enabled=true"
      - "discovery.type=single-node"
      - "path.repo=/usr/share/elasticsearch/data/snapshot"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - es:/usr/share/elasticsearch/data    # check for permission error when using bind mount, see readme
    expose:
      - "9200"

volumes:
  media:
  cache:
  redis:
  es:

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