I'm trying to make a call to an API, but for some reason localhost:4200 is being added in front of my route call to localhost:3000. 

I've looked through my code several times and have another API call that is functioning fine with the same type of code that I am using to do this API call.

Here is my service: 

```
import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { environment } from '../../environments/environment';

interface Tweet {
  name: string;
}

@Injectable({
  providedIn: 'root'
})
  export class TweetService {
    private url = environment.tweetsAPI;

    httpOptions = {
      headers: new HttpHeaders({'Content-Type': 'application/json'})
    };

    constructor(private http: HttpClient) {}

    getTweets() {
      console.log(this.url);
      return this.http.get(this.url);
    }
  }

```

Here is my route: 

```
app.route('/get-tweets').get((req, res) => {
  T.get('search/tweets', { q: 'iowa state since:2018-07-11 #gameday -filter:media -filter:retweets', count: 10 }, function(err, data, response) {
    let filteredTweets = [];
    _.each(data, userObj => {
      filteredTweets.push(userObj);
    })
    return res.status(200).json({
      message: 'Successfully returned tweets',
      tweets: filteredTweets
    })
  })
})

```

And inside my environment.ts file: 

```
tweetsAPI: 'http:/localhost:3000/get-tweets'

```

Getting this error:

```
ERROR HttpErrorResponse {headers: HttpHeaders, status: 404, statusText: "Not Found", url: "http://localhost:4200/localhost:3000/get-tweets", ok: false, …}

```