Release 0.2.0

• Added fiber
• Added Etag generate for public endpoints
• Added setting Cache-Control
• Added generate docker image for arm64
• Added multipart upload endpoint (more information in readme)
• Updated go version to 1.18
• Rewritten image processing
• Removed error with missing .env file in docker container
• Removed unused addr configuration
• Removed unused files path configuration
• Removed bimg library
• Public api is not required adding source name for getting the default image
• Moved docker image from alpine to distro-less
• Implemented app logger with saving to file.
• Fixed some warnings and better error handling.