[INLONG-770] update the readme document

[dockerzhang]

Fixes Jira Issue:
https://issues.apache.org/jira/browse/INLONG-770

Motivation

there are some building method changes, it's better to update the readme document,

Modifications

Describe the modifications you've done.

Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

(or)

This change is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

(example:)

• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
• If a feature is not applicable for documentation, explain why?
• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[codecov-commenter]

Codecov Report

Merging #567 (6109e47) into master (cdf6e75) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master    #567      +/-   ##
===========================================
- Coverage      7.72%   7.69%   -0.03%     
  Complexity      563     563              
===========================================
  Files           355     355              
  Lines         31081   31081              
  Branches       4972    4972              
===========================================
- Hits           2400    2393       -7     
- Misses        28191   28197       +6     
- Partials        490     491       +1     

Impacted Files	Coverage Δ
.../java/org/apache/flume/sink/tubemq/TubemqSink.java	51.42% <0.00%> (-4.00%)	⬇️

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[aloyszhang]

LGTM