[FEATURE] Core Development for 1.2.1

[andre-marcos-perez]

Introduction

On version 1.2.x we delivered full support to R programming language (R Jupyter kernel with IRkernel and SparkR API + Jupyter notebook).

Feature

On version 1.2.1 is totally dedicated to the community contribution. For SparkR, we removed CRAN repo dependency and started to download the dependency directly from Spark repository. For Scala, a lot of improvements: we enhanced scala lang and kernel interoperability with Spark by dynamically setting their version according to Spark distro version. We also exposed port 4040 to allow access to Spark driver web ui and upgraded JupyterLab version to its latest stable version. Finally, we added a staging branch between develop and master branch to allow the cicd pipeline testing.

Almost forgot, we integrated the repo with Patreon, now the project can be sponsored 💖

Description

• Added Patreon support link 💖
• Added staging branch between develop and master to test CI/CD pipeline without pushing images to Docker Hub
• Exposed Spark driver web ui 4040 port ([BUG] Application Web UI unavailable #39);
• Upgraded JupyterLab from v2.1.4 to v3.0.0.
• Made SparkR available for all Spark versions;
• Enhanced Spark compatibility with Scala kernel ([BUG] unable to create spark context from jupyterlab #35).

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