Fix CMD path to handle WORKDIR changes (#198)

ghostwriternr · web-flow · commit 93c6cc7c6b8d · 2025-11-08T10:01:46.000Z
Users extending the base Dockerfile with custom WORKDIR directives
encountered container startup failures due to relative paths in both
the startup script and CMD directive.

Changed both to use absolute paths, making the container immune to
WORKDIR changes in derived images.
diff --git a/.changeset/fix-workdir-cmd-path.md b/.changeset/fix-workdir-cmd-path.md
@@ -0,0 +1,5 @@
+---
+'@cloudflare/sandbox': patch
+---
+
+Fix container startup failures when WORKDIR is changed in derived Dockerfiles
diff --git a/packages/sandbox/Dockerfile b/packages/sandbox/Dockerfile
@@ -187,4 +187,4 @@ COPY packages/sandbox/startup.sh ./
 RUN chmod +x startup.sh
 
 # Use startup script
-CMD ["./startup.sh"]
+CMD ["/container-server/startup.sh"]
diff --git a/packages/sandbox/startup.sh b/packages/sandbox/startup.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
 
-exec bun dist/index.js
+exec bun /container-server/dist/index.js

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +'@cloudflare/sandbox': patch
 +---
++
 +Fix container startup failures when WORKDIR is changed in derived Dockerfiles
Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,3 @@`
`1`	`1`	`#!/bin/bash`
`2`	`2`
`3`		`-exec bun dist/index.js`
	`3`	`+exec bun /container-server/dist/index.js`