fix: pkg_resources not found + docker deprecated ENV, RUN errors

[adityak714]

Background

When running skaffold run to locally compile on a Kind (Kubernetes in Docker) cluster, some services (such as the emailservice and loadgenerator) do not run. They are stuck in a crash loop, and required a pip-constraints file to ensure setup-tools is under version 82.

• Additionally, commands of ENV and RUN in dockerfile need an equal sign =, and in JSONArgs format respectively, which some Dockerfiles in src/* did not have.

Fixes

• The solution was thanks to a suggestion in https://stackoverflow.com/a/79886564, which also worked on my end.
• Fixes in the RUN and ENV commands in Dockerfiles of some services added in all Dockerfiles for consistency and for compilation to work.

Testing Procedure:

• Go to the specific service's folder in src/ and do a docker build to inspect the changes, setting the destination as the folder itself. This is to inspect per-service compilation and if they build correctly or not.
• Doing skaffold run from the root directory of this project (where the skaffold.yaml file is situated).
• Tried on WSL2 x86_64 Ubuntu 24.04.4 LTS.
• Skaffold version: GoogleContainerTools/skaffold@f9beeb7b6
• Kind version: 0.32.0
• Kubectl:
  • Client Version: v1.36.1
  • Kustomize Version: v5.8.1
  • Server Version: v1.36.1

Additional Notes

• When doing skaffold run, a commonly occurring problem was the build suddenly stopping, leaving the creation of some services incomplete and interrupted. Repeating skaffold run multiple times was a temporary solution, but a timeout increase is needed.

The suggested changes concern the following strand in the Product Requirements:

1. Preserve the golden user journey taken by Kubernetes beginners

The following statement about Online Boutique should always be true:

• A user outside of Google can deploy Online Boutique's default configuration on a kind Kubernetes cluster. Being able to run Online Boutique on a kind cluster ensures that Online Boutique is free and cloud-agnostic. This is aligned with Google's mission of making information universally accessible and useful. To be specific, Online Boutique should be useful and accessible to developers that are new to Kubernetes.

Related PRs or Issues

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