title: how to set bitbucket pipelines to be manually triggered?
body: <p>i wrote a pipeline in bitbucket environment but i would like the pipeline to be triggered only when the user run it and not automatically on push or commit.
  here is the code:</p>
  <pre><code>pipelines:  
   branches:
      new_ui_apk:
        - step:
            name: Build apk
            size: 2x
            script:
              - JAVA_OPTS=&quot;-Xmx2048m -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8&quot;
              - docker build -t app-release:1.0.0 .
            services:
              - docker
            
  
  definitions:
    services:
      docker:
        memory: 7128
  </code></pre>
  <p>actually i use the skip ci tip to avoid it but if another team member push or commit any change, the pipeline will run, how else can i avoid it please?</p>