old_contents: const express = require("express");
  const bodyParser = require("body-parser");
  const methodOverride = require("method-override");
  const api = require("./api");
  
  function server(emitter, state, logger) {
      const app = express();
  
      app.use(bodyParser.json());
      app.use(methodOverride());
  
      app.use("/api", api(emitter, state, logger));
  
      if (process.env.NODE_ENV === "production") {
          app.use(express.static("client/build"));
      }
  
      app.use((err, req, res, next) => {
          if (!err) {
              next();
          }
  
          logger.error(err);
          res.status(err.status || 500);
          res.send(err.message);
      });
  
      const port = process.env.PORT || 3001;
      return {
          app,
          server: app.listen(port, () => {
              logger.info(`Listening on port ${port}`);
          })
      };
  }
  
  module.exports = server;
  
new_contents: const express = require("express");
  const bodyParser = require("body-parser");
  const methodOverride = require("method-override");
  const api = require("./api");
  
  function server(emitter, state, logger) {
      const app = express();
  
      app.use(bodyParser.json());
      app.use(methodOverride());
  
      app.use("/api", api(emitter, state, logger));
  
      if (process.env.NODE_ENV === "production") {
          app.use(express.static(__dirname + "/../client/build"));
      }
  
      app.use((err, req, res, next) => {
          if (!err) {
              next();
          }
  
          logger.error(err);
          res.status(err.status || 500);
          res.send(err.message);
      });
  
      const port = process.env.PORT || 3001;
      return {
          app,
          server: app.listen(port, () => {
              logger.info(`Listening on port ${port}`);
          })
      };
  }
  
  module.exports = server;
  
subject: Use absolute path for serving static assets.