fix path to lambda_handler in dockerfile

[bendsouza2]

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[bendsouza2]

• fix path to lambda_handler in docker file
• and enchant-devel install to fix enchant lib import
• aws creds hierarchy - ensure local methods not used when running in aws
• add event and context args to lambda handler

[bendsouza2]

Included in this PR:

• fix path to lambda_handler in docker file
• and enchant-devel install to fix enchant lib import
• add spanish dictionary installs to docker image
• aws creds hierarchy - ensure local authentication not used when running in aws
• add event and context args to lambda handler
• add logging and apply logging to all methods
• add lambda specific requirements
• add audio_cloud_path attribute to Audio class
• deprecate echogarden_generate_subtitles method --> use temp srt file generation from VideoGenerator class instead
• ensure generate_video method writes the temp_audio_file to a /tmp directory when running in lambda to prevent writing file to a read only file system
• add path to fonts in python code and ensure fonts are installed in docker image
• closes aws support #17 ----> aws support fully integrated