Rocket.Chat/packages/rocketchat-apps/client/admin/appInstall.html

<template name="appInstall">
	<section class="preferences-page preferences-page--new">
		{{> header sectionName="App_Installation" hideHelp=true fullpage=true}}
		<div class="preferences-page__content">
			{{#if isInstalling}}
				{{> loading}}
			{{else}}
				<div class="rc-form-group rc-grid">
					<div class="rc-input rc-w50 padded">
						<label class="rc-input__label">
							<div class="rc-input__title">{{>icon icon='clip'}}{{_ "App_Url_to_Install_From"}}</div>
							<div class="rc-input__wrapper">
								<input type="text" class="rc-input__element" name="appPackageUrl" id="appPackage" placeholder="https://rocket.chat/apps/package.zip" value="{{appUrl}}" >
							</div>
						</label>
					</div>
					<div class="rc-input-file rc-w50 padded">
						<label class="rc-input-file__label">
							<div class="rc-input-file__title">{{>icon icon='clip'}}{{_ "App_Url_to_Install_From_File"}}</div>
							<div class="rc-input-file__wrapper">
								<div class="rc-input-file__name">
									{{appFile}}
								</div>
								<input type="file" accept=".zip" class="rc-input-file__element" name="appPackageUrl" id="upload-app" placeholder="https://rocket.chat/apps/package.zip">
								<label for='upload-app' class="rc-button rc-button-secondary install">{{_ "Browse_Files"}}</label>
							</div>
						</label>
						  <!-- <input type="file" id="file" class="inputfile" onchange='uploadFile(this)'>
						  <label for="file">
						    <span id="file-name" class="file-box"></span>
						    <span class="file-button">
						      <i class="fa fa-upload" aria-hidden="true"></i>
						      Select File
						    </span>
						  </label>


						<label class="rc-input__label">
							<div class="rc-input__title">{{>icon icon='clip'}}{{_ "App_Url_to_Install_From_File"}}</div>
							<div class="rc-input__wrapper">
							</div>
						</label> -->
						<!-- <div class="rc-select-avatar__list-item rc-tooltip js-select-app-upload" aria-label="{{_ "Upload_file" }}">
							<label class="rc-select-avatar__upload-label app" for="upload-app">
								{{> icon block="rc-select-avatar__upload-icon" icon="upload"}}
							</label>
							<input type="file" name="" value="" id="upload-app" style="display:none;">
						</div> -->
					</div>
				</div>
				<div class="rc-button-group">
					<button class="rc-button rc-button--secondary js-cancel">{{_ "Cancel"}}</button>
					<button class="rc-button rc-button--primary js-install" disabled='{{disabled}}'>
						{{#if isUpdating}}
							{{_ "Update"}}
						{{else}}
							{{_ "Install"}}
						{{/if}}
					</button>
				</div>
			{{/if}}
		</div>
	</section>
</template>