[FLINK-20832][docs] Deliver bootstrap css and js ourselves

This closes #14583

NOTICE

@@ -9,6 +9,15 @@ See bundled license files for details.
 
 - jQuery v3.5.1 | (c) JS Foundation and other contributors
 	-> in "docs/page/js/jquery.min.js"
+- AnchorJS v3.1.0 (https://github.com/bryanbraun/anchorjs) Copyright (c) 2016 Bryan Braun
+    -> in "docs/page/js/anchor.min.js"
+- Bootstrap v3.3.4 (http://getbootstrap.com) Copyright 2011-2015 Twitter, Inc.
+    -> css in "docs/page/css/bootstrap.min.css"
+    -> js in "docs/page/js/bootstrap.min.js"
+    -> fonts in "docs/page/fonts"
+
+Note: The "docs/page/fonts/glyphicons-halflings*" fonts are included in Bootstrap, and licensed under the same license as Boostrap.
+See https://glyphicons.com/old/license.html#old-halflings-bootstrap for more information.
 
 This project bundles the following dependencies under the BSD license.
 See bundled license files for details.
@@ -39,4 +48,3 @@ The Apache Flink project contains or reuses code that is licensed under the Apac
 - Google Cloud Client Library for Java (https://github.com/googleapis/google-cloud-java) Copyright 2017 Google LLC
 
   See: flink-end-to-end-tests/flink-connector-gcp-pubsub-emulator-tests/src/test/java/org/apache/flink/streaming/connectors/gcp/pubsub/emulator/PubsubHelper.java
-

docs/_layouts/base.html

@@ -29,7 +29,7 @@ under the License.
     <link rel="canonical" href="{{ site.stable_baseurl }}{{ page.url | replace:'index.html',''}}">
 
     <!-- Bootstrap -->
-    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
+    <link rel="stylesheet" href="{% link page/css/bootstrap.min.css %}">
     <link rel="stylesheet" href="{% link page/css/flink.css %}">
     <link rel="stylesheet" href="{% link page/css/syntax.css %}">
     <link rel="stylesheet" href="{% link page/css/codetabs.css %}">
@@ -91,8 +91,8 @@ under the License.
     <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
     <script src="{% link page/js/jquery.min.js %}"></script>
     <!-- Include all compiled plugins (below), or include individual files as needed -->
-    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/3.1.0/anchor.min.js"></script>
+    <script src="{% link page/js/bootstrap.min.js %}"></script>
+    <script src="{% link page/js/anchor.min.js %}"></script>
     <script src="{% link page/js/flink.js %}"></script>
 
     <!-- Google Analytics -->

docs/page/js/anchor.min.js

+/**
+ * AnchorJS - v3.1.0 - 2016-02-12
+ * https://github.com/bryanbraun/anchorjs
+ * Copyright (c) 2016 Bryan Braun; Licensed MIT
+ */
+function AnchorJS(A){"use strict";function e(A){A.icon=A.hasOwnProperty("icon")?A.icon:"",A.visible=A.hasOwnProperty("visible")?A.visible:"hover",A.placement=A.hasOwnProperty("placement")?A.placement:"right",A.class=A.hasOwnProperty("class")?A.class:"",A.truncate=A.hasOwnProperty("truncate")?Math.floor(A.truncate):64}function t(A){var e;if("string"==typeof A||A instanceof String)e=[].slice.call(document.querySelectorAll(A));else{if(!(Array.isArray(A)||A instanceof NodeList))throw new Error("The selector provided to AnchorJS was invalid.");e=[].slice.call(A)}return e}function n(){if(null===document.head.querySelector("style.anchorjs")){var A,e=document.createElement("style"),t=" .anchorjs-link {   opacity: 0;   text-decoration: none;   -webkit-font-smoothing: antialiased;   -moz-osx-font-smoothing: grayscale; }",n=" *:hover > .anchorjs-link, .anchorjs-link:focus  {   opacity: 1; }",o=' @font-face {   font-family: "anchorjs-icons";   font-style: normal;   font-weight: normal;   src: url(data:application/x-font-ttf;charset=utf-8;base64,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) format("truetype"); }',i=" [data-anchorjs-icon]::after {   content: attr(data-anchorjs-icon); }";e.className="anchorjs",e.appendChild(document.createTextNode("")),A=document.head.querySelector('[rel="stylesheet"], style'),void 0===A?document.head.appendChild(e):document.head.insertBefore(e,A),e.sheet.insertRule(t,e.sheet.cssRules.length),e.sheet.insertRule(n,e.sheet.cssRules.length),e.sheet.insertRule(i,e.sheet.cssRules.length),e.sheet.insertRule(o,e.sheet.cssRules.length)}}this.options=A||{},this.elements=[],e(this.options),this.isTouchDevice=function(){return!!("ontouchstart"in window||window.DocumentTouch&&document instanceof DocumentTouch)},this.add=function(A){var o,i,s,a,r,c,l,h,g,u,B,Q,f=[];if(e(this.options),Q=this.options.visible,"touch"===Q&&(Q=this.isTouchDevice()?"always":"hover"),A||(A="h1, h2, h3, h4, h5, h6"),o=t(A),0===o.length)return!1;for(n(),i=document.querySelectorAll("[id]"),s=[].map.call(i,function(A){return A.id}),r=0;r<o.length;r++)if(this.hasAnchorJSLink(o[r]))f.push(r);else{if(o[r].hasAttribute("id"))a=o[r].getAttribute("id");else{h=this.urlify(o[r].textContent),g=h,l=0;do void 0!==c&&(g=h+"-"+l),c=s.indexOf(g),l+=1;while(-1!==c);c=void 0,s.push(g),o[r].setAttribute("id",g),a=g}u=a.replace(/-/g," "),B=document.createElement("a"),B.className="anchorjs-link "+this.options.class,B.href="#"+a,B.setAttribute("aria-label","Anchor link for: "+u),B.setAttribute("data-anchorjs-icon",this.options.icon),"always"===Q&&(B.style.opacity="1"),""===this.options.icon&&(B.style.fontFamily="anchorjs-icons",B.style.fontStyle="normal",B.style.fontVariant="normal",B.style.fontWeight="normal",B.style.lineHeight=1,"left"===this.options.placement&&(B.style.lineHeight="inherit")),"left"===this.options.placement?(B.style.position="absolute",B.style.marginLeft="-1em",B.style.paddingRight="0.5em",o[r].insertBefore(B,o[r].firstChild)):(B.style.paddingLeft="0.375em",o[r].appendChild(B))}for(r=0;r<f.length;r++)o.splice(f[r]-r,1);return this.elements=this.elements.concat(o),this},this.remove=function(A){for(var e,n,o=t(A),i=0;i<o.length;i++)n=o[i].querySelector(".anchorjs-link"),n&&(e=this.elements.indexOf(o[i]),-1!==e&&this.elements.splice(e,1),o[i].removeChild(n));return this},this.removeAll=function(){this.remove(this.elements)},this.urlify=function(A){var t,n=/[& +$,:;=?@"#{}|^~[`%!'\]\.\/\(\)\*\\]/g;return this.options.truncate||e(this.options),t=A.trim().replace(/\'/gi,"").replace(n,"-").replace(/-{2,}/g,"-").substring(0,this.options.truncate).replace(/^-+|-+$/gm,"").toLowerCase()},this.hasAnchorJSLink=function(A){var e=(" "+A.firstChild.className+" ").indexOf(" anchorjs-link ")>-1,t=(" "+A.lastChild.className+" ").indexOf(" anchorjs-link ")>-1;return e||t}}var anchors=new AnchorJS;
\ No newline at end of file

licenses/LICENSE.anchorjs

+MIT License
+
+Copyright (c) 2020 Bryan Braun
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file

licenses/LICENSE.bootstrap

+The MIT License (MIT)
+
+Copyright (c) 2011-2021 Twitter, Inc.
+Copyright (c) 2011-2021 The Bootstrap Authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file

pom.xml

@@ -1408,9 +1408,11 @@ under the License.
 						<!-- External web libraries. -->
 						<exclude>docs/**/jquery*</exclude>
 						<exclude>docs/**/bootstrap*</exclude>
+						<exclude>docs/**/anchor*</exclude>
 						<exclude>docs/Gemfile.lock</exclude>
 						<exclude>docs/ruby2/Gemfile.lock</exclude>
 						<exclude>docs/img/*.svg</exclude>
+						<exclude>**/docs/page/fonts/**</exclude>
 						<exclude>**/docs/page/font-awesome/**</exclude>
 						<exclude>**/resources/**/font-awesome/**</exclude>
 						<exclude>**/resources/**/jquery*</exclude>