Multi-image architecture and Go 1.25 upgrade

[pricem14pc]

What and why?

Upgrades to Go 1.25 and Introduces a multi architecture image build to support arm64 corporate Mac book, but maintain amd64 GCP run time.

How to test?

• check the existing image size and architecture (manifest) to confirm its only amd64 and bloated at > 500MB
• ensure multiple image architectures are built and pushed by this PR, and are listed in the manifest when GHA main.yaml runs
• ensure the amd64 application image pulled and deployed to GCP and off-network Mac books starts and functions as expected
• ensure the arm64 application image pulled and deployed on a corporate Mac book starts and functions as expected
• test the /db-migrations are correctly referenced, found on the system, and applied (i.e. creating the schema/tables initially and then subsequent deployments show "Database schema unchanged")
• manually test survey service features

Jira

https://officefornationalstatistics.atlassian.net/browse/RAS-1794

Useful info for testing

• when pulling the image to an arm64 development environment, ensure a pull of this PR image no longer shows the following warning

WARNING: image platform (linux/amd64) does not match the expected platform (linux/arm64)

• deploy your GCP env and exec into the container with the following (you can also do similar in a local Docker network with docker exec)

kubectl exec --namespace=$NAMESPACE --stdin --tty $POD_NAME --container=$CONTAINER_NAME -- /bin/sh

• notice the bloated image contains all the repo source code and the application binary is running as root

/src # ls -ltra
total 10580
-rwxr-xr-x    1 root     root           337 Nov 14 14:27 wait_for_startup_integration_tests.sh
drwxr-xr-x    2 root     root          4096 Nov 14 14:27 sql
drwxr-xr-x    2 root     root          4096 Nov 14 14:27 models
-rw-r--r--    1 root     root           460 Nov 14 14:27 manifest.yml
-rw-r--r--    1 root     root           616 Nov 14 14:27 manifest-template.yml
-rw-r--r--    1 root     root           465 Nov 14 14:27 manifest-prod.yml
-rw-r--r--    1 root     root           468 Nov 14 14:27 manifest-preprod.yml
-rw-r--r--    1 root     root          3865 Nov 14 14:27 main.go
-rw-r--r--    1 root     root        187452 Nov 14 14:27 go.sum
-rw-r--r--    1 root     root          1446 Nov 14 14:27 go.mod
-rw-r--r--    1 root     root           550 Nov 14 14:27 docker-compose.yml
drwxr-xr-x    2 root     root          4096 Nov 14 14:27 db-migrations
-rw-r--r--    1 root     root           544 Nov 14 14:27 compose-integration-tests.yml
drwxr-xr-x    3 root     root          4096 Nov 14 14:27 _infra
-rw-r--r--    1 root     root          4662 Nov 14 14:27 SECURITY.md
-rw-r--r--    1 root     root           152 Nov 14 14:27 RELEASE_NOTES.md
-rw-r--r--    1 root     root          4236 Nov 14 14:27 README.md
-rw-r--r--    1 root     root          3008 Nov 14 14:27 Makefile
-rw-r--r--    1 root     root          1104 Nov 14 14:27 LICENSE
-rw-r--r--    1 root     root           217 Nov 14 14:27 Dockerfile
-rw-r--r--    1 root     root          7476 Nov 14 14:27 API.md
-rw-r--r--    1 root     root           516 Nov 14 14:27 .gitignore
drwxr-xr-x    3 root     root          4096 Nov 14 14:27 .github
drwxr-xr-x    4 root     root          4096 Nov 14 14:28 build
-rw-r--r--    1 root     root         21937 Nov 14 14:29 coverage.txt
-rw-r-----    1 root     root          2305 Nov 14 14:29 gha-creds-84d4040d63b7a722.json
-rw-r--r--    1 root     root          2246 Nov 14 14:29 survey-11.0.66.tgz
drwxr-xr-x    7 root     root          4096 Nov 14 14:29 .git
-rwxr-xr-x    1 root     root      10490409 Nov 14 14:29 rm-survey-service
drwxr-xr-x    1 root     root          4096 Nov 14 14:29 .
drwxr-xr-x    1 root     root          4096 Jan  9 10:58 ..

• deploy this PR image to your env and exec into the container

kubectl exec --namespace=$NAMESPACE --stdin --tty $POD_NAME --container=$CONTAINER_NAME -- /bin/sh

• notice the image no longer contains all the repo source code and the application binary is running with a dedicated user account

/opt/survey $ ls -ltra
total 12316
drwxr-xr-x    1 root     root          4096 Jan  9 10:47 ..
-r-xr-x---    1 survey-user survey-group  12600215 Jan  9 10:47 main
drwxr-xr-x    1 survey-user survey-group      4096 Jan  9 10:47 .

/opt/survey $ ls -ltra /
drwxr-xr-x    1 survey-user survey-group      4096 Jan  9 11:42 db-migrations

[matthew-robinson-ons]

Tested migrations and application function. All working and looking good just one question around the commenting out rather than removal of links in the docker-compose file