add config.js to heroku

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fix bug
fix bug

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connection to mongodb on heroku

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fix bug

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fix gb bug

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fix db bug

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fix db bug

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fix db bug on heroku

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Fix db bug on heroku

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remove collection data on heroku

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create collection on heroku

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Try Error

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Try tp set db

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Change db version

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insert data

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debug on heroku

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debug on heroku

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debug heroku

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insert data

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