Create instagram_crawler.py (#2509)

* Create instagram_crawler.py

* codespell --ignore-words-list=followings

* Update web_programming/instagram_crawler.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update web_programming/instagram_crawler.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update web_programming/instagram_crawler.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update web_programming/instagram_crawler.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update web_programming/instagram_crawler.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update web_programming/instagram_crawler.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update web_programming/instagram_crawler.py

Co-authored-by: Christian Clauss <cclauss@me.com>

* Update instagram_crawler.py

* Add doctests

* fixup! except (json.decoder.JSONDecodeError, KeyError):

* if getenv("CONTINUOUS_INTEGRATION"): return

* Update instagram_crawler.py

* Update web_programming/instagram_crawler.py

Co-authored-by: Dhruv <dhruvmanila@gmail.com>

* added fake_useragent

* Update instagram_crawler.py

* Comment out doctests

Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: Dhruv <dhruvmanila@gmail.com>