Add Keycloak deployment artifacts and authentication

[ikyranas]

The Keycloak solution is used to authenticate users with the OpenIDC protocol.
The Sastix CMS server module is using the keycloak adapter to use the features.
More specifically:

• The commons-io dependency is upgraded due to known vulnerabilities.
• The keycloak-spring-boot-2-starter dependency is used.
• The security configuration of the server is changed to use Keycloak's adapter.
• Integration tests are provided to be used on a staging server.
• Docs are provided in Markdown form.
• Kubernetes and docker-compose artifacts are provided for Keycloak.
• Development environment setup with docker-compose is provided.
• Default configuration of MariaDB and Keycloak is provided for the development environment.

This pull request closes #1 , #2 .

[iskitsas]

@ikyrannas ,

I am getting a build error:

[INFO] -------------------------------------------------------------
[ERROR] /Users/iskitsas/gitRepos/sastix/cms/server/src/main/java/com/sastix/cms/server/services/content/impl/ZipHandlerServiceImpl.java:[84,32] reference to newFileSystem is ambiguous
  both method newFileSystem(java.nio.file.Path,java.lang.ClassLoader) in java.nio.file.FileSystems and method newFileSystem(java.nio.file.Path,java.util.Map<java.lang.String,?>) in java.nio.file.FileSystems match
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for SASTIX CMS 0.0.1-SNAPSHOT:
[INFO] 
[INFO] SASTIX CMS ......................................... SUCCESS [  0.223 s]
[INFO] Common Library ..................................... SUCCESS [  0.006 s]
[INFO] Common Data Objects ................................ SUCCESS [  2.270 s]
[INFO] Common Services .................................... SUCCESS [  0.887 s]
[INFO] Common Client ...................................... SUCCESS [  0.583 s]
[INFO] Common Api ......................................... SUCCESS [  0.211 s]
[INFO] Server ............................................. FAILURE [  1.744 s]
[INFO] CMS Client ......................................... SKIPPED
[INFO] Integration Tests .................................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  6.134 s
[INFO] Finished at: 2021-06-23T09:25:55+03:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.0:compile (default-compile) on project cms-server: Compilation failure
[ERROR] /Users/iskitsas/gitRepos/sastix/cms/server/src/main/java/com/sastix/cms/server/services/content/impl/ZipHandlerServiceImpl.java:[84,32] reference to newFileSystem is ambiguous
[ERROR]   both method newFileSystem(java.nio.file.Path,java.lang.ClassLoader) in java.nio.file.FileSystems and method newFileSystem(java.nio.file.Path,java.util.Map<java.lang.String,?>) in java.nio.file.FileSystems match

Do you have the same issue?

[iskitsas]

You can update the README.md file in the root folder to include some information on how someone can use Keycloak. Additionally, review what steps already there, and update where necessary.

Initially we can have Keycloak disabled, but we can provide instructions in this README how can someone easily turn it on through the relative property and/or scripts.

[ikyranas]

@iskitsas Hello,

I don't have the same issue.

[INFO] SASTIX CMS ......................................... SUCCESS [  0.315 s]
[INFO] Common Library ..................................... SUCCESS [  0.008 s]
[INFO] Common Data Objects ................................ SUCCESS [  3.160 s]
[INFO] Common Services .................................... SUCCESS [  1.374 s]
[INFO] Common Client ...................................... SUCCESS [  0.561 s]
[INFO] Common Api ......................................... SUCCESS [  0.128 s]
[INFO] Server ............................................. SUCCESS [ 25.124 s]
[INFO] CMS Client ......................................... SUCCESS [  2.934 s]
[INFO] Integration Tests .................................. SUCCESS [  1.460 s]

My version of the JDK is

openjdk 11.0.11 2021-04-20
OpenJDK Runtime Environment (build 11.0.11+9-Ubuntu-0ubuntu2.20.04)
OpenJDK 64-Bit Server VM (build 11.0.11+9-Ubuntu-0ubuntu2.20.04, mixed mode, sharing)

and I have Maven

Apache Maven 3.6.3