fix: Ensure committed files are normalized to LF

This avoids accidentally committing files with CRLF line endings which `rustfmt` will happily normalize to LF creating a very noisy diff from these invisibles.

.gitattributes

@@ -0,0 +1,19 @@
+# Pattern syntax:
+# https://git-scm.com/docs/gitignore#_pattern_format
+
+# Normalize line endings of all non-binary files to LF upon check-in (`git add` / `git commit`):
+* text=auto
+
+# Use `eol=lf` / `eol=crlf` to enforce specific line endings on checkout for compatibility:
+# https://www.git-scm.com/docs/gitattributes/#_eol
+# NOTE:
+# - This setting implies the `text` attribute.
+# - `eol=lf` may not work as expected, if a file was committed with CRLF prior to the introduction of `.gitattribtues`.
+#
+# Relevant files for this setting:
+# - `.sh` (LF) / `.bat` (CRLF) and similar scripts that are platform specific.
+# - Scripts that utilize a shebang (`#!/usr/bin/env python3`) to hint the interpreter to run.
+# - `Dockerfile` (base image environment likely expects LF):
+#   https://github.com/docker-mailserver/docker-mailserver/pull/3755
+
+Dockerfile* eol=lf

.github/workflows/build_cuda_all.yaml

@@ -70,7 +70,7 @@ jobs:
               uses: docker/build-push-action@v4
               with:
                 context: .
-                file: Dockerfile-cuda-all
+                file: Dockerfile.cuda-all
                 push: ${{ github.event_name != 'pull_request' }}
                 platforms: 'linux/amd64'
                 tags: ${{ steps.meta-cuda.outputs.tags }}