Five things you need to know today, Giving Tuesday, and a venue's anniversary

Good morning, Boston. Today is Giving Tuesday, a good day to give generously. Here are the five things you need to know in Boston business news to start your day. More Twitter employees in Boston are out  More workers in Twitter's Boston office are parting ways with their employer as billionaire's Elon Musk $44 billion takeover continues to spur fast changes at the social-media company. Anna Jaques nurses sound the alarm Nurses at Anna Jaques Hospital in Newburyport are sounding the alarm about…