chore(git): update gitignore and gitattributes

.gitattributes

@@ -10,17 +10,17 @@
 
 # Documents
 *.bibtex   text diff=bibtex
-*.doc           diff=astextplain
-*.DOC           diff=astextplain
-*.docx          diff=astextplain
-*.DOCX          diff=astextplain
-*.dot           diff=astextplain
-*.DOT           diff=astextplain
-*.pdf           diff=astextplain
-*.PDF           diff=astextplain
-*.rtf           diff=astextplain
-*.RTF           diff=astextplain
-*.md       text eol=lf
+*.doc      diff=astextplain
+*.DOC      diff=astextplain
+*.docx     diff=astextplain
+*.DOCX     diff=astextplain
+*.dot      diff=astextplain
+*.DOT      diff=astextplain
+*.pdf      diff=astextplain
+*.PDF      diff=astextplain
+*.rtf      diff=astextplain
+*.RTF      diff=astextplain
+*.md       text diff=markdown
 *.tex      text diff=tex
 *.adoc     text
 *.textile  text
@@ -30,6 +30,7 @@
 *.tsv      text
 *.txt      text
 *.sql      text
+*.ps1      text eol=crlf
 
 # Graphics
 *.png      binary
@@ -53,7 +54,22 @@
 # These are explicitly windows files and should use crlf
 *.bat      text eol=crlf
 *.cmd      text eol=crlf
-*.ps1      text eol=crlf
+
+# web frontend stack -- force LF so SRI hashes are always correct
+*.html     text eol=lf
+*.htm      text eol=lf
+*.css      text eol=lf
+*.min.css  text eol=lf
+*.js       text eol=lf
+*.min.js   text eol=lf
+
+# Visual Studio projects (Rider also)
+*.cs     diff=csharp
+*.sln    merge=union
+*.csproj merge=union
+*.vbproj merge=union
+*.fsproj merge=union
+*.dbproj merge=union
 
 # Serialisation
 *.json     text
@@ -66,19 +82,18 @@
 *.7z       binary
 *.gz       binary
 *.tar      binary
+*.tgz      binary
 *.zip      binary
 
-# nginx files
-*.conf     text eol=lf
+# Text files where line endings should be preserved
+*.patch    -text
 
 #
 # Exclude files from exporting
-#   only export helper scripts
 #
 
-.gitattributes export-ignore
-.gitignore     export-ignore
-.vscode        export-ignore
-.idea          export-ignore
-build          export-ignore
-README.md      export-ignore
+.gitattributes  export-ignore
+.gitignore      export-ignore
+.gitkeep        export-ignore
+.idea           export-ignore
+.vscode         export-ignore