added download an installation pages

src/site/antora/modules/ROOT/nav.adoc

@@ -15,11 +15,11 @@
     limitations under the License.
 ////
 
+* xref:download.adoc[]
 * xref:development.adoc[]
 * xref:manual/index.adoc[]
 ** xref:manual/configuration.adoc[]
 * xref:features.adoc[]
 * xref:release-notes.adoc[]
-* {logging-services-url}/download.html[Download]
 * {logging-services-url}/support.html[Support]
 * {logging-services-url}/security.html[Security]

src/site/antora/modules/ROOT/pages/download.adoc

@@ -0,0 +1,30 @@
+////
+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
+
+    https://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.
+////
+
+[#download]
+= Download
+
+You can manually download all published log4net distributions, verify them, and see their licensing information by following the instructions in the https://logging.apache.org/download.html[Download page] of https://logging.apache.org[Logging Services].
+
+[TIP]
+====
+* Are you looking for **the log4net installation instructions**?
+Proceed to xref:manual/installation.adoc[].
+* Are you looking for the list of changes associated with a particular release?
+Proceed to xref:release-notes.adoc[].
+====
+

src/site/antora/modules/ROOT/pages/index.adoc

@@ -15,6 +15,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 ////
 
+[#log4net]
 = log4net
 
 The Apache log4net library is a tool to help the programmer output log statements to a variety of output targets.

src/site/antora/modules/ROOT/pages/manual/installation.adoc

@@ -0,0 +1,35 @@
+////
+    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.
+////
+
+[#install]
+= Install Apache log4net
+
+The preferred way to install log4net is to use our https://www.nuget.org/packages/log4net[nuget package].
+
+Just add the following lines in your project file.
+[source,xml]
+----
+<ItemGroup>
+  <PackageReference Include="log4net" Version="*" />
+</ItemGroup>
+----
+Now you can use log4net. See our https://github.com/apache/logging-log4net/tree/master/examples[examples].
+
+[source,powershell]
+----
+dotnet add package log4net
+----