Add Local Bot API support

[k3it]

a slightly advanced configuration option to overcome the 20MB file upload limit. e.g. as mentioned here:
#440

more info:
https://github.com/python-telegram-bot/python-telegram-bot/wiki/Local-Bot-API-Server
https://github.com/tdlib/telegram-bot-api
tdlib/telegram-bot-api#381

Instructions for setting up local bot api and nginx dockers:

1. create telegram-bot-api-data volume (it is going to be shared between the bot api and nginx containers:

docker volume create telegram-bot-api-data

2. create and start the Bot API container (courtesy of https://github.com/aiogram/telegram-bot-api). docker-compose.yml the Bot API , eg:

version: '3.8'

services:
  telegram-bot-api:
    image: aiogram/telegram-bot-api:latest
    environment:
      TELEGRAM_API_ID: "your api id"
      TELEGRAM_API_HASH: "your api hash"
      TELEGRAM_LOCAL: Yes
      TELEGRAM_STAT: Yes

    volumes:
      - telegram-bot-api-data:/var/lib/telegram-bot-api
    ports:
      - "8081:8081"
      - "8082:8082"
    restart: unless-stopped

volumes:
  telegram-bot-api-data:
    external: true

4. create the nginx container docker-compose.yml:

version: '3.8'

services:
  nginx:
    image: nginx:latest  # Use the latest Nginx image
    volumes:
      - telegram-bot-api-data:/telegram-bot-api-data  # Mount the external volume
      - ./nginx.conf:/etc/nginx/conf.d/default.conf  # Mount the Nginx configuration file
    ports:
      - "8080:8080"  # Map port 8080 of the host to port 8080 of the container
    restart: unless-stopped

volumes:
  telegram-bot-api-data:  # Define the external volume
    external: true

and nginx.conf file:

server {
    listen 8080;

    server_name localhost;

    location / {
        rewrite ^.*telegram-bot-api(.*)$ /$1 last;
        root /telegram-bot-api-data/;  
        index index.html;
        try_files $uri $uri/ =404;
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }

    # More configuration if necessary...
}

(Adjust the configs above to taste)

5. configure chatgpt-telegram-bot variables (replace docker.lan with your docker host IP or dns name:

TELEGRAM_BOT_API_URL=http://docker.lan:8081/bot
TELEGRAM_BOT_API_BASE_FILE_URL=http://docker.lan:8080
TELEGRAM_BOT_API_LOCAL_MODE=true

Enjoy unlimited file uploads to the bot!

[k3it]

I noticed a interesting side benefit. the streaming messages work faster - the content in the responses is filled at a very good pace compared to the cloud API