<![CDATA[Please update Docker on the Cloudron buildserver]]>When executing cloudron build then instructions from more recent Docker version like multi-stage builds or simply copying data from another existing Docker image fail, e.g.:

Step 9/12 : COPY --from=mprasil/bitwarden:1.7.0 /web-vault /app/code/web-vault
Unknown flag: from
Build failed
Build failed
ERROR App could not be built due to errors above [ /usr/lib/node_modules/cloudron/src/helper.js:68:29 ]

Multistage builds or the possibility to copy artifacts from existing images (instead of compiling everything from scratch on top of the cloudron base image) reduce the size for additional layers and could greatly ease app development.

]]>https://forum.cloudron.io/topic/1718/please-update-docker-on-the-cloudron-buildserverRSS for NodeTue, 16 Jun 2026 12:16:05 GMTSat, 16 Mar 2019 13:20:42 GMT60<![CDATA[Reply to Please update Docker on the Cloudron buildserver on Mon, 18 Mar 2019 06:39:39 GMT]]>Thanks @girish!

With the above dockerfile cloudron build now succeeds.

I have a longer train ride on friday, maybe I can make something happen with bitwarden during it.

]]>https://forum.cloudron.io/post/3223https://forum.cloudron.io/post/3223Mon, 18 Mar 2019 06:39:39 GMT<![CDATA[Reply to Please update Docker on the Cloudron buildserver on Mon, 18 Mar 2019 00:42:10 GMT]]>@murgero @fbartels It's updated now to 18.09.2. Thanks!

]]>https://forum.cloudron.io/post/3222https://forum.cloudron.io/post/3222Mon, 18 Mar 2019 00:42:10 GMT<![CDATA[Reply to Please update Docker on the Cloudron buildserver on Sat, 16 Mar 2019 18:43:22 GMT]]>@murgero yes, I brought this up already in the bitwarden topic, but since this could be helpful in other scenarios I wanted to post it on its own.

]]>https://forum.cloudron.io/post/3220https://forum.cloudron.io/post/3220Sat, 16 Mar 2019 18:43:22 GMT<![CDATA[Reply to Please update Docker on the Cloudron buildserver on Sat, 16 Mar 2019 17:19:07 GMT]]>I believe this is a known issue. They might be working on it already.

]]>https://forum.cloudron.io/post/3219https://forum.cloudron.io/post/3219Sat, 16 Mar 2019 17:19:07 GMT