docs: migrate install instructions from Gemfury to GitHub Pages

The apt/yum package repositories have moved from Gemfury
(apt.fury.io/kurtosis-tech, yum.fury.io/kurtosis-tech) to GitHub Pages
(sdk.kurtosis.com/kurtosis-cli-release-artifacts).

Update all apt/yum URLs in:
- Install docs (installing-the-cli.md)
- Historical versions guide (installing-historical-versions.md)
- CI configs (.circleci/config.yml, .github/workflows/build.yml)

Also add a migration notice to the install page with one-liner commands
for users still pointing at the old Gemfury repositories.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: barnabasbusa

.circleci/config.yml

@@ -730,7 +730,7 @@ jobs:
       - <<: *steps_install_go
 
       - run: |
-          echo "deb [trusted=yes] https://apt.fury.io/kurtosis-tech/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
+          echo "deb [trusted=yes] https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
           sudo apt update
           sudo apt install kurtosis-cli
       # We don't send metrics to avoid polluting our logs
@@ -801,7 +801,7 @@ jobs:
           at: "<< pipeline.parameters.workspace-with-cli-binary-and-images-mountpoint >>"
 
       - run: |
-          echo "deb [trusted=yes] https://apt.fury.io/kurtosis-tech/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
+          echo "deb [trusted=yes] https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
           sudo apt update
           sudo apt install kurtosis-cli
       # We don't send metrics to avoid polluting our logs
@@ -841,7 +841,7 @@ jobs:
       - <<: *steps_install_go
 
       - run: |
-          echo "deb [trusted=yes] https://apt.fury.io/kurtosis-tech/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
+          echo "deb [trusted=yes] https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
           sudo apt update
           sudo apt install kurtosis-cli
       # We don't send metrics to avoid polluting our logs
@@ -1047,7 +1047,7 @@ jobs:
       - <<: *steps_install_go
 
       - run: |
-          echo "deb [trusted=yes] https://apt.fury.io/kurtosis-tech/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
+          echo "deb [trusted=yes] https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
           sudo apt update
           sudo apt install kurtosis-cli curl
       # We don't send metrics to avoid polluting our logs

.github/workflows/build.yml

@@ -875,7 +875,7 @@ jobs:
       # Install released Kurtosis CLI from apt
       - name: Install released Kurtosis CLI
         run: |
-          echo "deb [trusted=yes] https://apt.fury.io/kurtosis-tech/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
+          echo "deb [trusted=yes] https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
           sudo apt-get update
           sudo apt-get install -y kurtosis-cli
 

docs/docs/get-started/installing-the-cli.md

@@ -15,6 +15,20 @@ import TabItem from '@theme/TabItem';
 
 The instructions in this guide will walk you through installing the latest version of Kurtosis.
 
+:::warning Migrating from Gemfury?
+The old Gemfury-hosted apt/yum repositories (`apt.fury.io/kurtosis-tech` and `yum.fury.io/kurtosis-tech`) are **no longer supported**. If you previously installed Kurtosis via Gemfury, switch to the new repository with a single command:
+
+**apt (Ubuntu/Debian):**
+```bash
+echo "deb [trusted=yes] https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list && sudo apt update
+```
+
+**yum (RHEL/CentOS):**
+```bash
+sudo sed -i 's|https://yum.fury.io/kurtosis-tech/|https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/rpm/|' /etc/yum.repos.d/kurtosis.repo && sudo yum makecache
+```
+:::
+
 I. Install & Start Docker
 -----------------
 
@@ -49,7 +63,7 @@ xcode-select --install
 <TabItem value="apt" label="apt (Ubuntu)">
 
 ```bash
-echo "deb [trusted=yes] https://apt.fury.io/kurtosis-tech/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
+echo "deb [trusted=yes] https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
 sudo apt update
 sudo apt install kurtosis-cli
 ```
@@ -60,7 +74,7 @@ sudo apt install kurtosis-cli
 ```bash
 echo '[kurtosis]
 name=Kurtosis
-baseurl=https://yum.fury.io/kurtosis-tech/
+baseurl=https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/rpm/
 enabled=1
 gpgcheck=0' | sudo tee /etc/yum.repos.d/kurtosis.repo
 sudo yum install kurtosis-cli

docs/docs/guides/installing-historical-versions.md

@@ -46,7 +46,7 @@ sudo apt remove kurtosis-cli
 :::
 
 ```bash
-echo "deb [trusted=yes] https://apt.fury.io/kurtosis-tech/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
+echo "deb [trusted=yes] https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/ /" | sudo tee /etc/apt/sources.list.d/kurtosis.list
 sudo apt update
 sudo apt remove kurtosis-cli
 sudo apt install kurtosis-cli=<version> -V
@@ -68,7 +68,7 @@ sudo yum remove kurtosis-cli
 ```bash
 echo '[kurtosis]
 name=Kurtosis
-baseurl=https://yum.fury.io/kurtosis-tech/
+baseurl=https://sdk.kurtosis.com/kurtosis-cli-release-artifacts/rpm/
 enabled=1
 gpgcheck=0' | sudo tee /etc/yum.repos.d/kurtosis.repo
 sudo yum remove kurtosis-cli