Update docker image to use go 1.25, addressing vulnerabilities

[matsoob]

Addresses:
#1332
#1327

From local build and trivy check after this change:

Report Summary

┌──────────────────────────────┬──────────┬─────────────────┬─────────┐
│            Target            │   Type   │ Vulnerabilities │ Secrets │
├──────────────────────────────┼──────────┼─────────────────┼─────────┤
│ 71a588e905d0 (alpine 3.21.5) │  alpine  │        0        │    -    │
├──────────────────────────────┼──────────┼─────────────────┼─────────┤
│ usr/local/bin/migrate        │ gobinary │        0        │    -    │
└──────────────────────────────┴──────────┴─────────────────┴─────────┘

[Copilot]

Pull Request Overview

This PR updates the Go version in the Docker image from 1.24 to 1.25 to address security vulnerabilities identified in issues #1332 and #1327. The update resolves all previously reported vulnerabilities, as confirmed by the Trivy scan showing zero vulnerabilities in both the Alpine base image and the compiled Go binary.

Key Changes:

• Upgraded Go runtime version in Docker builder stage from 1.24 to 1.25

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[coveralls]

coverage: 54.037%. remained the same
when pulling ce3cb72 on matsoob:updateGoInBaseImage
into 39ab04d on golang-migrate:master.