NIFIREG-452: Migrate NiFi Registry into NiFi codebase (updated README) (#323)

diff --git a/.asf.yaml b/.asf.yaml
index fdb9b3f..1d13861 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -19,15 +19,15 @@
   labels:
     - nifi
     - java
-    - hacktoberfest
+    - nifi-registry
   features:
     wiki: false
     issues: false
     projects: false
   enabled_merge_buttons:
-    squash:  true
-    merge:   true
-    rebase:  true
+    squash:  false
+    merge:   false
+    rebase:  false
 notifications:
     commits:      commits@nifi.apache.org
     issues:       issues@nifi.apache.org
diff --git a/README.md b/README.md
index 59f1f09..70679f3 100644
--- a/README.md
+++ b/README.md
@@ -14,113 +14,20 @@
 -->
 [<img src="https://nifi.apache.org/assets/images/registry-logo.png" width="360" height="126" alt="Apache NiFi Registry" />][nifi-registry]
 
-[![ci-workflow](https://github.com/apache/nifi-registry/workflows/ci-workflow/badge.svg)](https://github.com/apache/nifi-registry/actions)
 [![Docker pulls](https://img.shields.io/docker/pulls/apache/nifi-registry.svg)](https://hub.docker.com/r/apache/nifi-registry/)
 [![Version](https://img.shields.io/maven-central/v/org.apache.nifi.registry/nifi-registry-framework.svg)](https://nifi.apache.org/registry)
 [![Slack](https://img.shields.io/badge/chat-on%20Slack-brightgreen.svg)](https://s.apache.org/nifi-community-slack)
 
 Registry—a subproject of Apache NiFi—is a complementary application that provides a central location for storage and management of shared resources across one or more instances of NiFi and/or MiNiFi.
 
-## Table of Contents
+## NOTICE: This subproject has been moved under the [Apache NiFi](https://github.com/apache/nifi) codebase as nifi-registry. See [NIFI-8528](https://issues.apache.org/jira/browse/NIFI-8528) for details
 
-- [Getting Started](#getting-started)
-- [License](#license)
+This repository is read-only and serves as an archive. All existing Pull Requests (PRs) should be resubmitted against the NiFi repository's main branch. Pull Requests can be ported 
+to the NiFi repo by adding ".patch" to the URL of your PR, downloading the patch, and applying it to a branch in your fork of the NiFi repo,
+for example:
 
-## Getting Started
+`git checkout -b NIFIREG-406`
 
-### Requirements
-    
-* Java 1.8 (above 1.8.0_45)
-* Maven 3.1.0, or newer
-* Recent git client
+`git apply --directory='nifi-registry' ~/289.patch`
 
-1) Clone the repo
-
-        git clone https://git-wip-us.apache.org/repos/asf/nifi-registry.git
-        git checkout main
-
-2) Build the project
-
-        cd nifi-registry
-        mvn clean install
-
-    If you wish to enable style and license checks, specify the contrib-check profile:
-    
-        mvn clean install -Pcontrib-check
-
-3) Start the application
-
-        cd nifi-registry-assembly/target/nifi-registry-<VERSION>-bin/nifi-registry-<VERSION>/
-        ./bin/nifi-registry.sh start
-   
-   Note that the application web server can take a while to load before it is accessible.   
-
-4) Accessing the application web UI
- 
-    With the default settings, the application UI will be available at [http://localhost:18080/nifi-registry](http://localhost:18080/nifi-registry) 
-   
-5) Accessing the application REST API
-
-    If you wish to test against the application REST API, you can access the REST API directly. With the default settings, the base URL of the REST API will be at `http://localhost:18080/nifi-registry-api`. A UI for testing the REST API will be available at [http://localhost:18080/nifi-registry-api/swagger/ui.html](http://localhost:18080/nifi-registry-api/swagger/ui.html) 
-
-6) Accessing the application logs
-
-    Logs will be available in `logs/nifi-registry-app.log`
-
-## Database Testing
-
-In order to ensure that NiFi Registry works correctly against different relational databases, 
-the existing integration tests can be run against different databases by leveraging the [Testcontainers framework](https://www.testcontainers.org/).
-
-Spring profiles are used to control the DataSource factory that will be made available to the Spring application context. 
-DataSource factories are provided that use the Testcontainers framework to start a Docker container for a given database and create a corresponding DataSource. 
-If no profile is specified then an H2 DataSource will be used by default and no Docker containers are required.
-
-Assuming Docker is running on the system where the build is running, then the following commands can be run:
-
-| Target Database | Build Command | 
-| --------------- | ------------- |
-| All supported   | `mvn verify -Ptest-all-dbs` |
-| H2 (default)    | `mvn verify` |
-| PostgreSQL 9.x  | `mvn verify -Dspring.profiles.active=postgres` | 
-| PostgreSQL 10.x | `mvn verify -Dspring.profiles.active=postgres-10` | 
-| MySQL 5.6       | `mvn verify -Pcontrib-check -Dspring.profiles.active=mysql-56` |
-| MySQL 5.7       | `mvn verify -Pcontrib-check -Dspring.profiles.active=mysql-57` |
-| MySQL 8         | `mvn verify -Pcontrib-check -Dspring.profiles.active=mysql-8`  |
-      
- When one of the Testcontainer profiles is activated, the test output should show logs that indicate a container has been started, such as the following:
- 
-    2019-05-15 16:14:45.078  INFO 66091 --- [           main] 🐳 [mysql:5.7]                           : Creating container for image: mysql:5.7
-    2019-05-15 16:14:45.145  INFO 66091 --- [           main] o.t.utility.RegistryAuthLocator          : Credentials not found for host (index.docker.io) when using credential helper/store (docker-credential-osxkeychain)
-    2019-05-15 16:14:45.646  INFO 66091 --- [           main] 🐳 [mysql:5.7]                           : Starting container with ID: ca85c8c5a1990d2a898fad04c5897ddcdb3a9405e695cc11259f50f2ebe67c5f
-    2019-05-15 16:14:46.437  INFO 66091 --- [           main] 🐳 [mysql:5.7]                           : Container mysql:5.7 is starting: ca85c8c5a1990d2a898fad04c5897ddcdb3a9405e695cc11259f50f2ebe67c5f
-    2019-05-15 16:14:46.479  INFO 66091 --- [           main] 🐳 [mysql:5.7]                           : Waiting for database connection to become available at jdbc:mysql://localhost:33051/test?useSSL=false&allowPublicKeyRetrieval=true using query 'SELECT 1'
-
-The Flyway connection should also indicate the given database:
-
-    2019-05-15 16:15:02.114  INFO 66091 --- [           main] o.a.n.r.db.CustomFlywayConfiguration     : Determined database type is MYSQL
-    2019-05-15 16:15:02.115  INFO 66091 --- [           main] o.a.n.r.db.CustomFlywayConfiguration     : Setting migration locations to [classpath:db/migration/common, classpath:db/migration/mysql]
-    2019-05-15 16:15:02.373  INFO 66091 --- [           main] o.a.n.r.d.CustomFlywayMigrationStrategy  : First time initializing database...
-    2019-05-15 16:15:02.380  INFO 66091 --- [           main] o.f.c.internal.license.VersionPrinter    : Flyway Community Edition 5.2.1 by Boxfuse
-    2019-05-15 16:15:02.403  INFO 66091 --- [           main] o.f.c.internal.database.DatabaseFactory  : Database: jdbc:mysql://localhost:33051/test (MySQL 5.7)
-
-For a full list of the available DataSource factories, consult the `nifi-registry-test` module.
-
-## License
-
-Except as otherwise noted this software is licensed under the
-[Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0.html)
-
-Licensed 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.
-
-[nifi-registry]: https://nifi.apache.org/registry
+[nifi-registry]: https://nifi.apache.org/registry
\ No newline at end of file