Create Plugin: Fix backend dev env for arm64 hosts

[jackw]

What this PR does / why we need it: Draft as requires testing across OS...

This PR changes the docker file and docker compose to not force amd64 which causes a mismatch between the go arch, docker arch and the host arch causing dlv to fail to work. The linked issue has further investigative info.

With the changes in this PR I can successfully connect with dlv using an M2 Macbook.

Which issue(s) this PR fixes:

Fixes #913

Special notes for your reviewer:

To test run the following in terminal...

npx @grafana/create-plugin@4.14.1-canary.990.e4ea168.0 --pluginName=test \
--pluginDescription="test plugin" \
--orgName=test \
--pluginType=datasource \
--hasBackend \
--hasGithubWorkflows \
--hasGithubLevitateWorkflow && \
cd test-test-datasource && \
npm i && \
npm run build && \
mage build:backend && \
DEVELOPMENT=true docker compose up

• Once the docker container has started up attempt to connect from the host via delve dlv connect localhost:2345.
• If that succeeds next try setting a breakpoint with break datasource.go:100.
• Navigate to datasource config page for the test datasource
• Click health check and acknowledge it's taking it's time...
• Back in terminal send delve two continue commands and you should see the health check complete successfully.

📦 Published PR as canary version: Canary Versions

:sparkles: Test out this PR locally via: ```bash npm install @grafana/create-plugin@4.14.1-canary.990.e4ea168.0 # or yarn add @grafana/create-plugin@4.14.1-canary.990.e4ea168.0 ```

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[oshirohugo]

Nice work Jack, thank you for addressing this one :D. I've tested in Linux and everything is working. I had to do some small changes that maybe you'll address in the final version, but it's good to mention, just in case.

• I had to set the TARGETARCH in the dockerfile:

      TARGETARCH: ${TARGETARCH:-amd64}

  I think we can document this in the final version, the same way we have the other arguments documented.

• I had to change the declaration of TARGETARCH in the dockerfile and put it after the FROM statement to make the build work. (Idk if this is related to linux or my docker version Docker version 27.0.2, build 912c1dd).

[jackw]

Nice work Jack, thank you for addressing this one :D. I've tested in Linux and everything is working. I had to do some small changes that maybe you'll address in the final version, but it's good to mention, just in case.

Thanks for taking the time to give me early feedback and provide solutions to the issues I'd created! 🥇 I've now updated the branch based on your suggestions and opened for review.

[oshirohugo]

I've testing and everything is working out of the box! :+1:

[grafana-plugins-platform-bot[bot]]

:rocket: PR was released in @grafana/create-plugin@4.14.1 :rocket: