Ignore Dockerfile by default

Author: lionello

tests/test1/ignored.Dockerfile

@@ -0,0 +1,2 @@
+# This file should not be included in the build context
+FROM scratch

upload.ts

@@ -6,6 +6,8 @@ import { promises as stream } from "stream";
 import * as tar from "tar";
 
 const SOURCE_DATE_EPOCH = process.env["SOURCE_DATE_EPOCH"] ?? "315532800"; // defaults to 1980-01-01, same as nix-shell
+
+// The default .dockerignore for projects that don't have one. Keep in sync with pkg/cli/context.go in CLI repo.
 const defaultDockerIgnore = `# Default .dockerignore file for Defang
 **/.DS_Store
 **/.direnv
@@ -18,13 +20,15 @@ const defaultDockerIgnore = `# Default .dockerignore file for Defang
 **/__pycache__
 **/compose.yaml
 **/compose.yml
-**/defang.exe
 **/docker-compose.yaml
 **/docker-compose.yml
 **/node_modules
 **/Thumbs.db
+Dockerfile
+*.Dockerfile
 # Ignore our own binary, but only in the root to avoid ignoring subfolders
 defang
+defang.exe
 # Ignore our project-level state
 .defang`;