private static String capitalizeFirstLetter(String string) {
    if (string.isEmpty()) {
      return string;
    }
    return Character.toUpperCase(string.charAt(0)) + string.substring(1);
  }
Builds a container with Jib.

<p>Example usage:

<pre>{@code
Jib.from(baseImage)
   .addLayer(sourceFiles, extractionPath)
   .setEntrypoint("myprogram", "--flag", "subcommand")
   .setProgramArguments("hello", "world")
   .addEnvironmentVariable("HOME", "/app")
   .addExposedPort(Port.tcp(8080))
   .addLabel("containerizer", "jib")
   .containerize(...);
}</pre>
jib-core/src/main/java/com/google/cloud/tools/jib/api/JibContainerBuilder.java