instagram: new extraction method

new extraction method first tries to fetch content directly from instagram graphql API, fallback to html embed page. in case every method fail, rely on 3rd party

README.md

@@ -1,7 +1,7 @@
 # govd
 a telegram bot for downloading media from various platforms
 
-this project was born after the discontinuation of a highly popular bot known as uvd, and draws significant inspiration from [yt-dlp](https://github.com/yt-dlp/yt-dlp)
+this project draws significant inspiration from [yt-dlp](https://github.com/yt-dlp/yt-dlp)
 
 - official instance: [@govd_bot](https://t.me/govd_bot)
 - support group: [govdsupport](https://t.me/govdsupport)
@@ -28,7 +28,7 @@ this project was born after the discontinuation of a highly popular bot known as
 # installation
 ## build
 > [!NOTE]
-> there's no official support for windows yet. if you want to run the bot on it, please follow [docker installation](#docker-recommended)
+> there's no official support for windows yet. if you want to run the bot on it, please follow [docker installation](#docker-recommended).
 
 1. clone the repository
     ```bash
@@ -54,7 +54,7 @@ this project was born after the discontinuation of a highly popular bot known as
     ```
 
 2. update the `.env` file to ensure the database properties match the environment variables defined for the mariadb service in the `docker-compose.yml` file.  
-   for enhanced security, it is recommended to change the `MYSQL_PASSWORD` property in `docker-compose.yaml` and ensure `DB_PASSWORD` in `.env` matches it.
+   for enhanced security, it is recommended to change the `MARIADB_PASSWORD` property in `docker-compose.yaml` and ensure `DB_PASSWORD` in `.env` matches it.
 
     the following line in the `.env` file **must** be set as: