set cache control on uploads

api/resolvers/upload.js

@@ -49,6 +49,7 @@ export default {
           Expires: 300,
           Conditions: [
             { 'Content-Type': type },
+            { 'Cache-Control': 'max-age=31536000' },
             { acl: 'public-read' },
             ['content-length-range', size, size]
           ]

components/upload.js

@@ -38,6 +38,7 @@ export default function Upload ({ as: Component, onSelect, onStarted, onError, o
       Object.keys(data.getSignedPOST.fields).forEach(key =>
         form.append(key, data.getSignedPOST.fields[key]))
       form.append('Content-Type', file.type)
+      form.append('Cache-Control', 'max-age=31536000')
       form.append('acl', 'public-read')
       form.append('file', file)