Add Maven Wrapper for consistent build environment

Author: GaneshPatil7517

.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

README.md

@@ -401,11 +401,11 @@ build errors due to incompatible versions of `Node.js` tooling installed on your
 
 ### Preparing Maven
 
-Make sure that you have Maven installed.
+This project includes Maven Wrapper, so you don't need to install Maven manually. Just use `./mvnw` (or `mvnw.cmd` on Windows) instead of `mvn`. The wrapper automatically downloads the correct Maven version (3.9.6) on first run.
 
-    $ mvn --version
+If you prefer using your own Maven installation:
 
-If this command fails with an error, you do not have Maven installed.
+    $ mvn --version
 
 Please install Maven using your favorite package manager (like [Homebrew](https://brew.sh/)) or from
 official [Maven binaries](https://maven.apache.org/install.html)
@@ -423,7 +423,11 @@ When building everything from scratch the build executes following steps:
 
 You can do all of this with one single command:
 
-    $ mvn package
+    $ ./mvnw package
+
+Or on Windows:
+
+    > mvnw.cmd package
 
 The whole process takes up to five minutes (time to grab some coffee!)
 
@@ -434,7 +438,7 @@ When the build is finished you should see the generated website in the `public`
 When rebuilding the website you can optimize the build process as some of the steps are only required for a fresh
 build from scratch. You can skip the ui theme rendering (unless you have changes in the theme itself).
 
-    $ mvn package -Dskip.theme
+    $ ./mvnw package -Dskip.theme
 
 This should save you some minutes in the build process. You can find the updated website content in the `public` directory.
 
@@ -445,7 +449,7 @@ When rebuilding the website the process uses some cached content (e.g. the fetch
 If you want to start from scratch for some reason you can simply add the `clean` operation to the build which removes
 all generated sources in the project first.
 
-    $ mvn clean package
+    $ ./mvnw clean package
 
 Of course this then takes some more time than an optimized rebuild (time to grab another coffee!).