upload video with heroku server
im trying to upload video using a heroku server, but i got H18 error
https://devcenter.heroku.com/articles/error-codes#h18-server-request-interrupted

im using this flow:  

1. upload video with `apollo-upload-client`
2. the resolver gets the video stream
3. then i use `youtube-api` npm package to upload video to youtube

all worked fine on my local machine, but once i deployed it to heroku server i got error H18 during uploading.

**error:**

client log:

`Network error: Failed to fetch`
`POST https://staging-www.italianfishingtv.it/graphql net::ERR_CONNECTION_RESET`

server log

`2018-11-07T12:31:53.985268+00:00 heroku[router]: sock=backend at=error code=H18 desc="Server Request Interrupted" method=POST path="/graphql" host=staging-www.italianfishingtv.it request_id=d64d92f2-4518-4c15-83ce-42531998a16b fwd="87.20.112.78" dyno=web.1 connect=0ms service=469ms status=503 bytes=340 protocol=https
`

**client config:**

```
const authLink = new ApolloLink((operation, forward) => {
    const token = Accounts._storedLoginToken();

    operation.setContext(() => ({
        headers: {
            'meteor-login-token': token
        }
    }));

    return forward(operation);
});

const uploadLink = createUploadLink({
    uri: Meteor.absoluteUrl('graphql')
});

const cache = new InMemoryCache();

const apolloClient = new ApolloClient({
    cache,
    link: authLink.concat(uploadLink)
    // link: uploadLink
});
```

**server config:**

```
createApolloServer(
        {schema},
        {
            graphiql: true,
            configServer: expressServer => {
                expressServer.use(bodyParser.json({limit: '1000mb'}));
                expressServer.use(graphqlUploadExpress());
            }
        }
    );
```

**resolver:**

```
export const resolvers = {
    Mutation: {
        async submitFishWithFather(obj, {data}, {user}) {
            const {stream, filename, mimetype, encoding} = await data.upload;

            const req = Youtube.videos.insert({
                resource: {
                    // Video title and description
                    snippet: {
                        title: `a pesca con papà - ${data.name} ${data.surname} - ${data.email} - ${new Date()}`,
                    },
                    status: {
                        privacyStatus: "private"
                    }
                },
                part: "snippet,status",
                media: {
                    body: stream
                }
            }, (err, videoData) => {
                if (err) {
                    throw  err;
                }
                console.log(videoData);

                sendNotificationEmail(data, videoData);
            });


            return {};
        }
    }
};
```

