A possible strike by thousands of dockworkers at East and Gulf coast ports in October could result in major disruptions in the supply chain of goods coming in and out of the U.S., according to an export on container trade. TheInternational Longshoremen’s Association (ILA), representing more than 85,000 dockworkers, may go on strike on Oct. 1 as the union’s contract expires on Sept. 30 and negotiations between the ILA and U.S. Maritime Alliance of terminal operators show signs of breaking down, said Christian Roeloffs, CEO of online container leasing platform Container xChange. “A strike now ap…