Josh Johnson, of Biddeford, had a front row seat to the start of Instagram. It begins, as it probably should, with a phone call from the two Instagram founders who were still figuring out what they had built. Josh Johnson had been posting every day—quietly, methodically—on an app that had barely introduced itself to the world. Three days after it launched, he downloaded it because someone on a podcast said it made photos look better. There were no hashtags yet, no search, no