Add some logging

The timestamps accompanying these should be helpful for diagnosing #19.

.eslintrc.json

@@ -3,5 +3,8 @@
   "extends": "@domenic",
   "env": {
     "node": true
+  },
+  "rules": {
+    "no-console": "off"
   }
 }

lib/app.js

@@ -52,21 +52,26 @@ router.post("/wattsi", bodyParser, async ctx => {
 
   try {
     try {
+      console.log(`Running wattsi ${args.join(" ")}`);
       const result = await execFile("wattsi", args);
 
       const outputFile = path.join(outDirectory, "output.txt");
       await writeFile(outputFile, `${result.stdout}\n\n${result.stderr}`, { encoding: "utf-8" });
+      console.log(`  wattsi succeeded`);
     } catch (e) {
       if (e.stdout) {
         e.message = `${e.stdout}\n\n${e.stderr}`;
       }
       ctx.response.set("Wattsi-Exit-Code", e.code);
+      console.log(`  wattsi failed: ${e.code}`);
       ctx.throw(400, e.message);
     }
 
     ctx.response.set("Wattsi-Exit-Code", "0");
     const zipFilePath = `${outDirectory}.zip`;
+    console.log(`  zipping result`);
     await execFile("7za", ["a", "-tzip", "-r", zipFilePath, `./${outDirectory}/*`]);
+    console.log(`  zipping succeeded`);
 
     ctx.response.type = "application/zip";
     ctx.response.body = createReadStream(zipFilePath);