Product

Overview

How it works Watch it work All 35 features Screenshots How ForgeRepo™ is secured

Keep bad packages out

Malware scanning Typosquat detection Dependency confusion protection Cooling off new releases Allow lists and block lists

When something goes wrong

Kill switch Who has it Lockdown and degraded modes Vulnerability monitoring

Developers and approvals

Requests and auto approve Check, walk and review Waivers Dry run
Formats

Languages

Private npm registry PyPI proxy and private index Private NuGet feed and proxy Maven repository proxy RubyGems mirror Composer and Packagist proxy

Apple, containers and Linux

CocoaPods CDN mirror Swift package registry Docker registry mirror RPM mirror for dnf and yum APT mirror for Debian and Ubuntu

Use it as

An npm firewall Artifacts, SBOMs and lifecycle More than one node SSO, roles and allow lists
Learn

Guides

Learn secure development Secure coding Secure pipelines Unsafe vs safe Security and development

Supply chain

Supply chain attacks, 2016 to 2026 Software supply chain security
Compare Side by side, all four ForgeRepo™ vs JFrog ForgeRepo™ vs Sonatype ForgeRepo™ vs Cloudsmith
Docs

Start

Getting started Download All documentation Questions

For developers

npm setup pip setup docker login Push a Docker image CI basics

For administrators

First setup Rules and their order Six incidents, walked through Backup and upgrade
Pricing Install it
  1. Home
  2. Documentation
  3. Developer Guide
  4. Build with a base image from packages.example.com

Container images

Build with a base image from packages.example.com

Change the FROM line and log in before you build.

Build from a base image in ForgeRepo™
$ cat Dockerfile
FROM packages.example.com/node:22-alpine
WORKDIR /app
COPY server.js .
CMD ["node", "server.js"]
$ docker build -t storefront:dev .
...
#6 extracting sha256:16da5a6403776464b5bf551ef294de57da242eac594527ea551a46e7f76ac2d6 done
#6 DONE 3.9s

#7 [2/3] WORKDIR /app
#7 DONE 0.0s

#8 [3/3] COPY server.js .
#8 DONE 0.0s

#9 exporting to image
#9 exporting layers 0.0s done
#9 writing image sha256:c37920df3f243ade153858121ff7166f690a6af67e18aee3d00100ec5a067989 done
#9 naming to docker.io/library/storefront:dev done
#9 DONE 0.0s

Captured by running these commands against a real ForgeRepo™.

Change every FROM line, including the ones in multi-stage builds. The build uses the login you made with docker login.

Dockerfile

FROM packages.example.com/node:22-alpine AS build
WORKDIR /app
COPY . .
RUN npm ci && npm run build

FROM packages.example.com/nginx:stable-alpine
COPY --from=build /app/dist /usr/share/nginx/html

Careful

A RUN npm ci inside the build does not see your NPM_TOKEN. Pass it as a build secret, never as a build argument, because build arguments are saved in the image. See npm inside a docker build.