chore: add .dockerignore file to exclude unnecessary files from Docker builds

.dockerignore

@@ -0,0 +1,28 @@
+# Binaries for programs and plugins
+*.exe
+*.ogg
+*.m4a
+*.zip
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+**/songs
+.vscode
+
+package-lock.json
+
+*sqlite3
+.env