Question
Environment Variables (Create-React-App) on App Platform
- Posted on April 20, 2021
- ReactDigitalOcean App PlatformDockerBuilding on DigitalOcean
Asked by juliomhenriquez
I’m running a aspnet core application with an SPA created using creat-react-app.
In this application I use some environment variables in the client. The official way to do this with this tool is to prefix the variables with “REACT_APP_”. (https://create-react-app.dev/docs/adding-custom-environment-variables/)
I’ve created these variables in my component settings. By default these are scoped as RUN_AND_BUILD_TIME. But they don’t seem to be available when my page is being built.
I added a couple of extra RUN instructions in my docker file to try and print these variables, they come out empty.
My application’s dockerfile is based on example provided here:
https://docs.docker.com/samples/dotnetcore/
With the only modification being the installation of nodejs.
Thanks in advance, any help or clarification will be greatly appreciated. Hopefully I just missed something from the docs :)
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Hollie's Hub for Good
Working on improving health and education, reducing inequality, and spurring economic growth? We’d like to help.
Hey there!
You mentioned you are running this from a Dockerfile.
Environment variables are only available as build-args for Dockerfile builds in App Platform. So you should declare them in the Dockerfile as an ARG and then set the ENV variable in the Dockerfile from the build-arg.
Something like this may work: