chore: add gulpfile

gulpfile.js

@@ -0,0 +1,25 @@
+const gulp = require('gulp');
+const typedoc = require('gulp-typedoc');
+
+gulp.task('docs', () => {
+  return gulp.src([
+    'index.ts',
+    '!node_modules/**/*'])
+    .pipe(typedoc({
+      name: 'ng2-uploader docs',
+      mode: 'file',
+      out: 'docs',
+      ignoreCompilerErrors: true,
+      experimentalDecorators: true,
+      emitDecoratorMetadata: true,
+      target: 'ES5',
+      moduleResolution: 'node',
+      preserveConstEnums: true,
+      stripInternal: true,
+      suppressExcessPropertyErrors: true,
+      suppressImplicitAnyIndexErrors: true,
+      module: 'commonjs',
+      ignoreCompilerErrors: true,
+      noLib: true
+    }));
+});