fix: Trim tar record padding to avoid broken-pipe failure on Podman

Testcontainers.slnx

@@ -66,7 +66,7 @@
         <Project Path="src/Testcontainers.Seq/Testcontainers.Seq.csproj"/>
         <Project Path="src/Testcontainers.ServiceBus/Testcontainers.ServiceBus.csproj"/>
         <Project Path="src/Testcontainers.Sftp/Testcontainers.Sftp.csproj"/>
-        <Project Path="src/Testcontainers.Temporalio/Testcontainers.Temporalio.csproj"/>
+        <Project Path="src/Testcontainers.Temporal/Testcontainers.Temporal.csproj"/>
         <Project Path="src/Testcontainers.Toxiproxy/Testcontainers.Toxiproxy.csproj"/>
         <Project Path="src/Testcontainers.Typesense/Testcontainers.Typesense.csproj"/>
         <Project Path="src/Testcontainers.Weaviate/Testcontainers.Weaviate.csproj"/>
@@ -139,7 +139,7 @@
         <Project Path="tests/Testcontainers.Seq.Tests/Testcontainers.Seq.Tests.csproj"/>
         <Project Path="tests/Testcontainers.ServiceBus.Tests/Testcontainers.ServiceBus.Tests.csproj"/>
         <Project Path="tests/Testcontainers.Sftp.Tests/Testcontainers.Sftp.Tests.csproj"/>
-        <Project Path="tests/Testcontainers.Temporalio.Tests/Testcontainers.Temporalio.Tests.csproj"/>
+        <Project Path="tests/Testcontainers.Temporal.Tests/Testcontainers.Temporal.Tests.csproj"/>
         <Project Path="tests/Testcontainers.Tests/Testcontainers.Tests.csproj"/>
         <Project Path="tests/Testcontainers.Toxiproxy.Tests/Testcontainers.Toxiproxy.Tests.csproj"/>
         <Project Path="tests/Testcontainers.Typesense.Tests/Testcontainers.Typesense.Tests.csproj"/>

src/Testcontainers/Containers/TarOutputMemoryStream.cs

@@ -36,7 +36,7 @@ public TarOutputMemoryStream(string targetDirectoryPath, ILogger logger)
     /// </summary>
     /// <param name="logger">The logger.</param>
     public TarOutputMemoryStream(ILogger logger)
-      : base(new MemoryStream(), Encoding.Default)
+      : base(new MemoryStream(), TarArchiveDefaults.TarBlockFactor, Encoding.Default)
     {
       _logger = logger;
       IsStreamOwner = false;

src/Testcontainers/Images/DockerfileArchive.cs

@@ -10,8 +10,8 @@ namespace DotNet.Testcontainers.Images
   using System.Threading.Tasks;
   using DotNet.Testcontainers.Configurations;
   using ICSharpCode.SharpZipLib.Tar;
-  using Microsoft.Extensions.Logging;
   using JetBrains.Annotations;
+  using Microsoft.Extensions.Logging;
 
   /// <summary>
   /// Generates a tar archive with Docker configuration files. The tar archive can be used to build a Docker image.
@@ -192,7 +192,7 @@ public async Task<string> Tar(CancellationToken ct = default)
 
       using (var tarOutputFileStream = new FileStream(dockerfileArchiveFilePath, FileMode.Create, FileAccess.Write))
       {
-        using (var tarOutputStream = new TarOutputStream(tarOutputFileStream, Encoding.Default))
+        using (var tarOutputStream = new TarOutputStream(tarOutputFileStream, TarArchiveDefaults.TarBlockFactor, Encoding.Default))
         {
           tarOutputStream.IsStreamOwner = false;
 

src/Testcontainers/TarArchiveDefaults.cs

@@ -0,0 +1,14 @@
+namespace DotNet.Testcontainers
+{
+  internal static class TarArchiveDefaults
+  {
+    // Keep the record size equal to the block size (512 B) so SharpZipLib does
+    // not write extra zero padding beyond the two standard EOF blocks. The
+    // default factor of 20 produces ~8 KB of zeros after EOF, which can trigger
+    // a race in Podman's archive handler. The tar subprocess exits after the EOF
+    // blocks while the HTTP sender is still flushing the padding, causing EPIPE
+    // (HTTP 500 "broken pipe"). See:
+    // https://github.com/testcontainers/testcontainers-dotnet/issues/1683.
+    internal const int TarBlockFactor = 1;
+  }
+}