public static void checkHttpTimeoutProperty() throws NumberFormatException {
    checkNumericSystemProperty(HTTP_TIMEOUT, Range.atLeast(0));
  }
Checks the {@code jib.httpTimeout} system property for invalid (non-integer or negative)
values.

@throws NumberFormatException if invalid values
jib-core/src/main/java/com/google/cloud/tools/jib/global/JibSystemProperties.java