Fix #20658 docker-compose version is obsolete warning

[jhdxr]

Comprehensive Summary of your change

This is PR removed the obsoleted global level version from the docker compose template.

Issue being fixed

Fixes #20658

Please indicate you've done the following:

• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[jhdxr]

I don't think I have the permission to label this PR. or maybe there is robot can help me to do so? It's not mentioned in the CONTRIBUTING.md

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.30%. Comparing base (c8c11b4) to head (2e107f1).
Report is 256 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #20659      +/-   ##
==========================================
+ Coverage   45.36%   46.30%   +0.93%     
==========================================
  Files         244      247       +3     
  Lines       13333    13779     +446     
  Branches     2719     2845     +126     
==========================================
+ Hits         6049     6380     +331     
- Misses       6983     7069      +86     
- Partials      301      330      +29     

Flag	Coverage Δ
unittests	46.30% <ø> (+0.93%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 491 files with indirect coverage changes

[MinerYang]

Please confirm it work with legacy docker-compose version ,
Thx~

[jhdxr]

Please confirm it work with legacy docker-compose version , Thx~

Can I check what's the minimun version we need to support?

[MinerYang]

Please confirm it work with legacy docker-compose version , Thx~

Can I check what's the minimun version we need to support?

We need at least:

• docker-compose (v1.18.0+) or docker compose v2 (docker-compose-plugin)
• docker engine Version 20.10.10-ce+ or higher

[jhdxr]

Please confirm it work with legacy docker-compose version , Thx~

Can I check what's the minimun version we need to support?

We need at least:

* docker-compose (v1.18.0+) or docker compose v2 (docker-compose-plugin)

* docker engine Version 20.10.10-ce+ or higher

I did a test for docker compose without version line on Rocky Linux 8 with docker engine v20.10.10 and docker compose v2, and everything looks good.

env:

NAME="Rocky Linux"
VERSION="8.9 (Green Obsidian)"
ID="rocky"
ID_LIKE="rhel centos fedora"
VERSION_ID="8.9"

Server: Docker Engine - Community
 Engine:
  Version:          20.10.10
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.9
  Git commit:       e2f740d
  Built:            Mon Oct 25 07:41:17 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.32
  GitCommit:        8b3b7ca2e5ce38e8f31a34f35b2b68ceb8470d89
 runc:
  Version:          1.1.12
  GitCommit:        v1.1.12-0-g51d5e94
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Docker Compose version v2.27.0

BTW, docker CE 20.10 is EOL half year ago, I think we may increase the min supported to v23.0 (see https://endoflife.date/docker-engine)

[MinerYang]

lgtm

@jhdxr, Thanks for your contribution to Harbor community!

Best,
Miner

[wy65701436]

lgtm