Feature Request: helloSecretWorld - Converge on one Dockerfile

[johnwalicki]

Is your feature request related to a problem? Please describe.

Using the technique described in #560 and implemented in #561
The same can be done for helloSecretWorld

Many of the examples/ repos have Dockerfile.amd64 / Dockerfile.arm / Dockerfile.arm64 / Dockerfile.ppc64le
I did a meld on some of these Dockerfiles and they are slightly different. (which is not good)
These multiple Dockerfiles and differences are unnecessary. We could delete them all. Create one common Dockerfile

Then in the Makefile, tell the docker build --platform linux/$(ARCH)
Docker/Podman will figure out which arch image to pull and build.

Describe the solution you'd like.

Remove all the Dockerfile.* files. Create a common Dockerfile

[saurav1004]

@johnwalicki similar to Issue #566, I can create a single dockerfile for the helloSecretWorld service too (replacing the old ones).

If you can assign me both issues, I can write both the dockerfiles and create a common PR ?

[johnwalicki]

@saurav1004 Since this examples repo is one giant repo, you can create a single PR which modifies files in multiple example subdirectories.

Thanks for working on this issue.

[saurav1004]

@johnwalicki I have made all necessary modifications for both the services mqttbroker and helloSecretWorld. I have made a draft PR, will mark it ready for review, once you confirm

[johnwalicki]

Looks good. Nice work. Thanks!

The PR is ready to merge once you remove the Draft status.

[saurav1004]

Thanks !! I have removed the draft status. I think you can merge now.

[johnwalicki]

This change has been released:
https://github.com/open-horizon/examples/releases/tag/v2.30.0-1142