title: Docker-Compose file has yaml.scanner.ScannerError
body: <p><code>compose.yml</code> file, which looks like this:</p>
  
  <pre><code>version: '2'
  services:
    discovery-microservice:
      build: discovery-microservice
        context: /discovery-microservice/target/docker
        dockerfile: Dockerfile
    ports:
     - "8761:8761"
  </code></pre>
  
  <p>While I am executing it I get the following error:</p>
  
  <pre><code>yaml.scanner.ScannerError: mapping values are not allowed here
  in "C:\...\docker-compose.yml", line 5, column 14
  </code></pre>
  
  <p>From what I see, nothing is wrong with the format, e.g. whitespaces missing. My overall goal is to specify a development mode docker-compose file, pointing it to the target directories from the different modules.<br>
  What am I doing wrong here?</p>