4 stories tagged docker.
A Docker container vs virtual machine comparison: containers share the host kernel and run isolated processes in megabytes, while VMs virtualize hardware and carry a full OS in gigabytes. The right base image and layer order cut a 2 GB image to under 100 MB.
Reduce Docker image size by choosing slim bases and multi-stage builds. A 2.54 GB image can drop under 200 MB, cutting pull time and storage cost tenfold.
To write a Dockerfile that builds fast, order instructions from least to most frequently changing. Copy dependency files before source code so Docker reuses cached layers. Reordering two lines cut rebuild time 81 percent, from 37.4 to 7.1 seconds.
A critical Gitea Docker auth bypass, CVE-2026-20896, lets attackers impersonate any user with one HTTP header. Over 6,200 instances are exposed online.