[Snyk] Security upgrade golang from 1.19.2-buster to 1.20rc2-buster

[alvarocabanas]

This PR was automatically created by Snyk using the credentials of a real user.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image. #### Changes included in this PR - build/Dockerfile We recommend upgrading to `golang:1.20rc2-buster`, as this image has only 184 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected. Some of the most important vulnerabilities in your base image include: | Severity | Priority Score / 1000 | Issue | Exploit Maturity | | :------: | :-------------------- | :---- | :--------------- | |  | **614** | Uncontrolled Search Path Element
[SNYK-DEBIAN10-GIT-2635966](https://snyk.io/vuln/SNYK-DEBIAN10-GIT-2635966) | No Known Exploit | |  | **614** | Uncontrolled Search Path Element
[SNYK-DEBIAN10-GIT-2949147](https://snyk.io/vuln/SNYK-DEBIAN10-GIT-2949147) | No Known Exploit | |  | **614** | Out-of-bounds Write
[SNYK-DEBIAN10-GIT-3051708](https://snyk.io/vuln/SNYK-DEBIAN10-GIT-3051708) | No Known Exploit | |  | **514** | Link Following
[SNYK-DEBIAN10-GIT-3051728](https://snyk.io/vuln/SNYK-DEBIAN10-GIT-3051728) | No Known Exploit | |  | **571** | Integer Overflow or Wraparound
[SNYK-DEBIAN10-LIBKSBA-3179190](https://snyk.io/vuln/SNYK-DEBIAN10-LIBKSBA-3179190) | No Known Exploit | --- **Note:** _You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs._ For more information: 🧐 [View latest project report](https://app.snyk.io/org/albanas/project/17ea27b7-fc99-4fa1-824a-819db32dc522?utm_source=github&utm_medium=referral&page=fix-pr) 🛠 [Adjust project settings](https://app.snyk.io/org/albanas/project/17ea27b7-fc99-4fa1-824a-819db32dc522?utm_source=github&utm_medium=referral&page=fix-pr/settings) [//]: # 'snyk:metadata:{"prId":"5d38bef3-8850-4e77-bfe6-52f265f7d51f","prPublicId":"5d38bef3-8850-4e77-bfe6-52f265f7d51f","dependencies":[{"name":"golang","from":"1.19.2-buster","to":"1.20rc2-buster"}],"packageManager":"dockerfile","projectPublicId":"17ea27b7-fc99-4fa1-824a-819db32dc522","projectUrl":"https://app.snyk.io/org/albanas/project/17ea27b7-fc99-4fa1-824a-819db32dc522?utm_source=github&utm_medium=referral&page=fix-pr","type":"auto","patch":[],"vulns":["SNYK-DEBIAN10-GIT-3051708","SNYK-DEBIAN10-GIT-2949147","SNYK-DEBIAN10-GIT-2635966","SNYK-DEBIAN10-LIBKSBA-3179190","SNYK-DEBIAN10-GIT-3051728"],"upgrade":["SNYK-DEBIAN10-GIT-2635966","SNYK-DEBIAN10-GIT-2949147","SNYK-DEBIAN10-GIT-3051708","SNYK-DEBIAN10-GIT-3051728","SNYK-DEBIAN10-LIBKSBA-3179190"],"isBreakingChange":false,"env":"prod","prType":"fix","templateVariants":["updated-fix-title","priorityScore"],"priorityScoreList":[614,614,614,571,514]}' --- **Learn how to fix vulnerabilities with free interactive lessons:** 🦉 [Learn about vulnerability in an interactive lesson of Snyk Learn.](https://learn.snyk.io/?loc=fix-pr)

[kang-makes]

This is an image that is only used in build time, so it is only vulnerable during the build time which is a controlled scenario and does not impact us.

Using a release candidate of the image is also not a good idea as it is not a well-tested scenario.

Closing.