Add new postgresql env vars (#1)

[ksquaredkey]

• Add support for additional PostgreSQL Container env variables.

Added interface for environment variables that the PostgreSQL container now supports:

• POSTGRES_INITDB_ARGS
• POSTGRES_INITDB_WALDIR
• POSTGRES_HOST_AUTH_METHOD
• PGDATA

As a bonus, added tests for POSTGRES_INITDB_ARGS and POSTGRES_HOST_AUTH_METHOD.

Issue #278

[codecov-commenter]

Codecov Report

Merging #279 (60b9eed) into master (29629e2) will increase coverage by 0.14%.
The diff coverage is 100.00%.

@@ Coverage Diff @@## master #279 +/- ##
==========================================
+ Coverage 86.73% 86.87% +0.14% 
==========================================
Files 29 29 Lines 814 823 +9 Branches 57 59 +2 ==========================================
+ Hits 706 715 +9 
Misses 78 78 Partials 30 30 

Impacted Files	Coverage Δ
testcontainers/postgres.py	100.00% <100.00%> (ø)

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[ksquaredkey]

Hmm, is testcontaners-python an abandoned project?

[tillahoffmann]

Hey, sorry for the delay. I'll revisit this PR once #296 is merged.

[tillahoffmann]

#296 has been merged. Would you mind rebasing on main, and we can have a look at getting this merged?

[ksquaredkey]

Uh. Not sure why the PR above changed. I renamed master to main in my Fork to match the upstream here about the time this says I deleted the master branch. From the look of #296, it looks like I'll have substantial refactoring to make to match current main, so maybe not a bad thing if I start with a fresh post-296 PR.

[ksquaredkey]

If anyone stumbles across this old PR, I never got around to refactoring it and @santi posted a better, cleaner way to do what I wanted in the comments of #278.