included oauth security

[nilavghosh]

• Included OAuth bearer token security for the predict function
• Reference : https://fastapi.tiangolo.com/tutorial/security/simple-oauth2/
• Added the token endpoint
• No DB added as of now
• changed config paths to absolute paths
• added requirements.txt

[kartik4949]

also @nilavghosh can we put model.py and schema in autodeploy/model and autodeploy/schema

[kartik4949]

@nilavghosh also we can delete .npy file too