501 Not Implemented error in small web app - reactjs

Question

I am trying to upload images to an S3 bucket with react and expressjs. When I attempt to upload the image I get a 501 Not Implemented Error. I am using axios to contact the end point I created in the server code.
My react code:
class FileUpload extends Component {
state = {
file: null
};
submitFile = (event) => {
event.preventDefault();
const formData = new FormData();
formData.append('file', this.state.file[0]);
axios.post(`test-upload`, formData, {
headers: {
'Content-Type': 'multipart/form-data'
}
}).then(response => {
// handle your response;
}).catch(error => {
// handle your error
});
}
handleFileUpload = (event) => {
this.setState({file: event.target.files});
}
render () {
return (
<form onSubmit={this.submitFile}>
<input label='upload file' type='file' onChange=
{this.handleFileUpload} />
<button type='submit'>Send</button>
</form>
);
}
}
export default FileUpload;
My server code:
const uploadFile = (buffer, name, type) => {
const params = {
ACL: 'public-read',
Body: buffer,
Bucket: process.env.S3_BUCKET,
ContentType: type.mime,
Key: `${name}.${type.ext}`
};
return s3.upload(params).promise();
};
app.use('/', (req,res) =>{
res.send(JSON.stringify({ greeting: `Hello!` }));
});
// Define POST route
app.post('/test-upload', (request, response) => {
const form = new multiparty.Form();
form.parse(request, async (error, fields, files) => {
if (error) throw new Error(error);
try {
const path = files.file[0].path;
const buffer = fs.readFileSync(path);
const type = fileType(buffer);
const timestamp = Date.now().toString();
const fileName = `bucketFolder/${timestamp}-lg`;
const data = await uploadFile(buffer, fileName, type);
return response.status(200).send(data);
} catch (error) {
return response.status(400).send(error);
}
});
});
This was done by following a guide on the internet but there seems to be something missing that I just can't figure out.

Answer 1

Figured it out in the end,
axios.post(/test-upload,
should have been
axios.post(http://localhost:3000/test-upload,