Read docker label correctly, fixes #368 (#501)

lib/read-metadata.js

@@ -91,9 +91,7 @@ async function readMetaData(
         name = basename(path)
 
         if (!quiet && !isStatic) {
-          console.log(
-            `> No \`name\` in \`package.json\`, using ${chalk.bold(name)}`
-          )
+          console.log(`> No \`name\` in \`package.json\`, using ${chalk.bold(name)}`)
         }
       }
     }
@@ -125,11 +123,9 @@ async function readMetaData(
 
         // Unescape and convert into string
         try {
-          labels[key] = JSON.parse(args[key])
+          labels[key] = args[key]
         } catch (err) {
-          const e = Error(
-            `Error parsing value for LABEL ${key} in \`Dockerfile\``
-          )
+          const e = Error(`Error parsing value for LABEL ${key} in \`Dockerfile\``)
           e.userError = true
           throw e
         }
@@ -144,13 +140,9 @@ async function readMetaData(
 
         if (!quiet) {
           if (hasNowJson) {
-            console.log(
-              `> No \`name\` LABEL in \`Dockerfile\` or \`name\` field in \`now.json\`, using ${chalk.bold(name)}`
-            )
+            console.log(`> No \`name\` LABEL in \`Dockerfile\` or \`name\` field in \`now.json\`, using ${chalk.bold(name)}`)
           } else {
-            console.log(
-              `> No \`name\` LABEL in \`Dockerfile\`, using ${chalk.bold(name)}`
-            )
+            console.log(`> No \`name\` LABEL in \`Dockerfile\`, using ${chalk.bold(name)}`)
           }
         }
       }