fix(server): terminate ws connection if server not ready

Previously we were exiting early from the websocket connection handler
if the server wasn't ready but not terminating the actual connection.

This meant that a client could be connected but websocket
messages were otherwise not handled.

Now we simply terminate the connection so that clients can retry.

core/src/server/server.ts

@@ -299,15 +299,17 @@ export class GardenServer {
     const wsRouter = new Router()
 
     wsRouter.get("/ws", async (ctx) => {
+      // The typing for koa-websocket isn't working currently
+      const websocket: Koa.Context["ws"] = ctx["websocket"]
+
       if (!this.garden) {
-        return this.notReady(ctx)
+        this.log.debug("Server not ready.")
+        websocket.terminate()
+        return
       }
 
       const connId = uuidv4()
 
-      // The typing for koa-websocket isn't working currently
-      const websocket: Koa.Context["ws"] = ctx["websocket"]
-
       // Helper to make JSON messages, make them type-safe, and to log errors.
       const send = <T extends ServerWebsocketMessageType>(type: T, payload: ServerWebsocketMessages[T]) => {
         const event = { type, ...(<object>payload) }