reworked docker setup

docker/SqlCollationSwitcher/SqlCollationSwitcher.ps1

@@ -0,0 +1,34 @@
+param(
+    [string]$compressedFile
+)
+
+# Load .NET assembly for file handling
+Add-Type -AssemblyName System.IO.Compression.FileSystem
+
+# Resolve absolute path of the compressed file
+$absoluteCompressedFile = Resolve-Path $compressedFile
+
+# Generate file names
+$workingDir = Split-Path $absoluteCompressedFile
+$uncompressedFile = Join-Path $workingDir ($compressedFile -replace '^\.\\', ''  -replace '\.sql\.gz$', '_uncompressed.sql')
+$modifiedFile = Join-Path $workingDir ($compressedFile -replace '^\.\\', '' -replace '\.sql\.gz$', '_modified.sql')
+$recompressedFile = Join-Path $workingDir ($compressedFile -replace '^\.\\', '' -replace '\.gz$', '_modified.sql.gz')
+
+# Decompress .sql.gz file using .NET Framework
+[System.IO.Compression.ZipFile]::ExtractToDirectory($absoluteCompressedFile, $workingDir)
+
+# Read content of uncompressed file
+$content = Get-Content -Path $uncompressedFile -Raw
+
+# Replace text
+$content = $content -replace 'utf8mb4_0900_ai_ci', 'utf8mb4_general_ci'
+
+# Write modified content to file
+Set-Content -Path $modifiedFile -Value $content -Encoding UTF8
+
+# Compress .sql file back to .sql.gz using .NET Framework
+[System.IO.Compression.ZipFile]::CreateFromDirectory($workingDir, $recompressedFile)
+
+# Cleanup: Optionally, you can remove the uncompressed and modified files if you don't need them anymore
+# Remove-Item $uncompressedFile
+# Remove-Item $modifiedFile