Add platforms for Docker image and improve build commands

[ricoberger]

• I added a CHANGELOG entry for this change.
• I adjusted the corresponding documentation for this change.
• I adjusted the values.yaml file and the documentation for all values.

[codecov-commenter]

Codecov Report

Merging #327 (1018275) into rework-kobs-architecture (0eba463) will not change coverage.
The diff coverage is n/a.

@@                    Coverage Diff                    @@
##           rework-kobs-architecture     #327   +/-   ##
=========================================================
  Coverage                     47.66%   47.66%           
=========================================================
  Files                            60       60           
  Lines                          3365     3365           
=========================================================
  Hits                           1604     1604           
  Misses                         1713     1713           
  Partials                         48       48           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6fba814...1018275. Read the comment docs.