add basic db setup, add vm expirations and cron to handle them, and add fields for sweetalert button classes

db_init.py

@@ -0,0 +1,17 @@
+from sqlalchemy import Column, ForeignKey, Integer, String, Date
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import relationship
+from sqlalchemy import create_engine
+
+Base = declarative_base()
+
+
+class VM_Expiration(Base):
+    __tablename__ = 'vm_expiration'
+    id = Column(Integer, primary_key=True)
+    expire_date = Column(Date, nullable=False)
+
+
+engine = create_engine('sqlite:///proxstar.db')
+
+Base.metadata.create_all(engine)