[BEAM-825] Fill in the documentation/runners/apex portion of the website

[tweise]

R: @davorbonaci

This is on top of #98

Please note that the example command doesn't actually use HDFS yet, the provider isn't present.

[asfbot]

Refer to this link for build results (access rights to CI server needed):
https://builds.apache.org/job/beam_PreCommit_Website_Stage/426/

Jenkins built the site at commit id b681fa2 with Jekyll and staged it here. Happy reviewing.

Note that any previous site has been deleted. This staged site will be automatically deleted after its TTL expires. Push any commit to the pull request branch or re-trigger the build to get it staged again.

[asfbot]

Refer to this link for build results (access rights to CI server needed):
https://builds.apache.org/job/beam_PreCommit_Website_Stage/428/

Jenkins built the site at commit id 239e000 with Jekyll and staged it here. Happy reviewing.

Note that any previous site has been deleted. This staged site will be automatically deleted after its TTL expires. Push any commit to the pull request branch or re-trigger the build to get it staged again.

[asfbot]

Refer to this link for build results (access rights to CI server needed):
https://builds.apache.org/job/beam_PreCommit_Website_Stage/429/

Jenkins built the site at commit id 7e9aa08 with Jekyll and staged it here. Happy reviewing.

Note that any previous site has been deleted. This staged site will be automatically deleted after its TTL expires. Push any commit to the pull request branch or re-trigger the build to get it staged again.

[davorbonaci]

LGTM. Merging.

(Please keep the bug open to track the removal of the comment that says to change the underlying example.)

[tweise]

@davorbonaci I created BEAM-2053 - please comment if the suggested change to the examples makes sense.

[davorbonaci]

(makes sense)