add flask command sco_database_uri

scodoc.py

@@ -274,6 +274,13 @@ def list_depts(depts=""):  # list-dept
             print(f"{dept.id}\t{dept.acronym}")
 
 
+@app.cli.command()
+def scodoc_database_uri():  # list-dept
+    """print the database_uril
+    """
+    print(app.config["SQLALCHEMY_DATABASE_URI"])
+
+
 @app.cli.command()
 @with_appcontext
 def import_scodoc7_users():  # import-scodoc7-users