[close #207] cdc: modify ticdc dockerfile for tikv-cdc

[zeminzhou]

Signed-off-by: zeminzhou zhouzemin@pingcap.com

What problem does this PR solve?

modify ticdc dockerfile for tikv-cdc

Issue Number: close #207

Problem Description: TBD

What is changed and how does it work?

modify ticdc dockerfile for tikv-cdc

[codecov]

Codecov Report

Merging #208 (88c3d2f) into main (1d8847b) will increase coverage by 0.0410%.
The diff coverage is n/a.

❗ Current head 88c3d2f differs from pull request most recent head b5f229d. Consider uploading reports for the commit b5f229d to get more accurate results

@@               Coverage Diff                @@
##               main       #208        +/-   ##
================================================
+ Coverage   61.5926%   61.6337%   +0.0410%     
================================================
  Files           170        170                
  Lines         13763      13809        +46     
================================================
+ Hits           8477       8511        +34     
+ Misses         4661       4652         -9     
- Partials        625        646        +21     

Flag	Coverage Δ
cdc	61.6337% <ø> (+0.0410%)	⬆️

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

Impacted Files	Coverage Δ
cdc/pkg/pdtime/acquirer.go	58.1395% <0.0000%> (-6.9768%)	⬇️
cdc/cdc/kv/client.go	83.8616% <0.0000%> (-2.1614%)	⬇️
cdc/pkg/orchestrator/etcd_worker.go	78.5714% <0.0000%> (-1.6807%)	⬇️
cdc/cdc/sorter/unified/merger.go	68.2847% <0.0000%> (-0.6473%)	⬇️
cdc/cdc/owner/status_provider.go	20.5882% <0.0000%> (+2.4064%)	⬆️
cdc/pkg/pipeline/pipeline.go	79.7101% <0.0000%> (+2.8985%)	⬆️
cdc/cdc/sorter/unified/file_backend.go	53.9473% <0.0000%> (+20.1754%)	⬆️

[pingyu]

LGTM~

Suggest to add a merge CI (CI after PR merged) to automatically push a latest image to hub.pingcap.net later, for ease of future use.

[haojinming]

LGTM