## What changes were proposed in this pull request?
Github now provides free CI/CD for build, test, and deploy. This PR enables a simple Github Actions to build master with JDK8 with latest Ubuntu. We can extend it with different versions of JDK, and even build Spark with docker images in the future.
Closes#25440 from dbtsai/actions.
Authored-by: DB Tsai <d_tsai@apple.com>
Signed-off-by: DB Tsai <d_tsai@apple.com>
## What changes were proposed in this pull request?
Tighten up some key links to the project and download pages to use HTTPS
## How was this patch tested?
N/A
Closes#24665 from srowen/HTTPSURLs.
Authored-by: Sean Owen <sean.owen@databricks.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
## What changes were proposed in this pull request?
Updates links to the wiki to links to the new location of content on spark.apache.org.
## How was this patch tested?
Doc builds
Author: Sean Owen <sowen@cloudera.com>
Closes#15967 from srowen/SPARK-18073.1.
## What changes were proposed in this pull request?
Link to contributing wiki in PR template, README.md
## How was this patch tested?
Doc-only change, tested by Jekyll
Author: Sean Owen <sowen@cloudera.com>
Closes#15429 from srowen/SPARK-17840.
## What changes were proposed in this pull request?
(Please fill in changes proposed in this fix)
## How was the this patch tested?
(Please explain how this patch was tested. E.g. unit tests, integration tests, manual tests)
(If this patch involves UI changes, please attach a screenshot; otherwise, remove this)
Author: Rahul Tanwani <tanwanirahul@gmail.com>
Closes#11343 from tanwanirahul/pull_request_template.
