fix: healthcheck error

Author: wenxing-wang-ey

merkle-tree/src/middleware/assign-db-connection.js

@@ -14,15 +14,14 @@ export default async function(req, res, next) {
       2,
     )}`,
   );
-
+  if (req.path === '/healthcheck') {
+    return next();
+  }
   try {
     const contractId = req.body.contractId;
-    logger.silly(`before request.body.contractName`);
     let contractName = req.body.contractName || req.query.contractName;
     if (contractName === undefined) {
-      // const contractNameTest = req.body[0].contractName;
-      logger.silly(`before setting no-contract-name`);
-      const contractNameTest = 'no-contract-name'
+      const contractNameTest = req.body[0].contractName;
       if (contractNameTest === undefined) {
         throw new Error('No contractName key provided in req.body.');
       } else {