Dockerfiles should specify a base image
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ID: docker-best-practices/no-from-image
Language: Docker
Severity: Warning
Category: Best Practices
Description
The rule stipulates that all Dockerfiles must specify a base image. This is important because without specifying a base image, you are building a container from scratch, and this is likely what is not intended.
To avoid violating this rule, always declare a base image at the start of your Dockerfile using the FROM keyword. For example, FROM ubuntu:18.04 sets the base image to Ubuntu 18.04.
Non-Compliant Code Examples
Compliant Code Examples
FROM image as base
# foo
FROM image2
