Production image is now built automatically in Dockerhub

[potiuk]

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Make sure to mark the boxes below before creating PR: [x]

• Description above provides context of the change
• Unit tests coverage for changes (not needed for documentation changes)
• Commits follow "How to write a good git commit message"
• Relevant documentation is updated including usage instructions.
• I will engage committers as explained in Contribution Workflow Example.

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In case of fundamental code change, Airflow Improvement Proposal (AIP) is needed.
In case of a new dependency, check compliance with the ASF 3rd Party License Policy.
In case of backwards incompatible changes please leave a note in UPDATING.md.
Read the Pull Request Guidelines for more information.

[codecov-io]

Codecov Report

Merging #8314 into master will decrease coverage by 0.51%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8314      +/-   ##
==========================================
- Coverage   88.45%   87.94%   -0.52%     
==========================================
  Files         940      940              
  Lines       45354    45354              
==========================================
- Hits        40120    39888     -232     
- Misses       5234     5466     +232     

Impacted Files	Coverage Δ
...flow/providers/apache/cassandra/hooks/cassandra.py	21.25% <0.00%> (-72.50%)	⬇️
...w/providers/apache/hive/operators/mysql_to_hive.py	35.84% <0.00%> (-64.16%)	⬇️
airflow/providers/postgres/operators/postgres.py	47.82% <0.00%> (-52.18%)	⬇️
airflow/providers/redis/operators/redis_publish.py	50.00% <0.00%> (-50.00%)	⬇️
airflow/providers/mongo/sensors/mongo.py	53.33% <0.00%> (-46.67%)	⬇️
airflow/providers/mysql/operators/mysql.py	55.00% <0.00%> (-45.00%)	⬇️
airflow/providers/redis/sensors/redis_key.py	61.53% <0.00%> (-38.47%)	⬇️
airflow/executors/celery_executor.py	50.67% <0.00%> (-37.84%)	⬇️
...roviders/google/cloud/operators/postgres_to_gcs.py	54.28% <0.00%> (-31.43%)	⬇️
airflow/providers/postgres/hooks/postgres.py	78.87% <0.00%> (-15.50%)	⬇️
... and 4 more

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