Describe in README how to build solr from source (#2294)

Co-authored-by: Jan Høydahl <[email protected]>

Author: freedev

README.md

@@ -73,6 +73,28 @@ Guide](https://solr.apache.org/guide/solr/latest/getting-started/solr-tutorial.h
 - Slack: Solr Community Channel.  Sign up at https://s.apache.org/solr-slack
 - IRC: `#solr` on [libera.chat](https://web.libera.chat/?channels=#solr)
 
+## Developer Documentation
+
+Learn more about developing Solr by reading through the developer docs in [./dev-docs](./dev-docs) source tree or building Solr from source in [./dev-docs/solr-source-code.adoc](./dev-docs/solr-source-code.adoc)
+
+### Quickstart
+
+Solr uses [Gradle](https://gradle.org/) for its build system. Here are some useful hints to build and run Solr locally:
+
+- To build a Solr dev distribution:
+
+```
+./gradlew dev
+```
+
+- To run the Solr dev distribution locally:
+
+```
+cd ./solr/packaging/build/dev
+bin/solr start -c
+```
+
+- Open a web browser and go to http://localhost:8983/solr/ to access the Solr Admin interface. You can also use the `bin/solr` script to create and manage Solr collections. For example use the `bin/solr post` tool to index some sample data.
 
 ## Get Involved
 Please review [CONTRIBUTING.md](CONTRIBUTING.md) for information on contributing to the project.
@@ -84,4 +106,3 @@ To get involved in the developer community:
 - [Issue Tracker (JIRA)](https://issues.apache.org/jira/browse/SOLR)
 - IRC: `#solr-dev` on [libera.chat](https://web.libera.chat/?channels=#solr-dev)
 
-Learn more about developing Solr by reading through the developer docs in [./dev-docs](./dev-docs) source tree.