ci: use GitHub-hosted ubuntu-latest runners (#32)

Public repos get free, unlimited standard GitHub-hosted runners. Move
self-hosted Linux CI jobs to ubuntu-latest: frees the home-lab servers,
runs PR code in throwaway isolated VMs (removing the fork-PR attack
surface), and costs nothing on public repos. The previous self-hosted
fork-guard is removed as it is no longer needed.

Co-authored-by: GeiserX <drumsergio@gmail.com>

Author: GeiserX

.github/workflows/dockerhub-description.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   update-description:
-    runs-on: [self-hosted, Linux, X64]
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
 

.github/workflows/main.yml

@@ -17,7 +17,7 @@ env:
 jobs:
   test:
     name: Test
-    runs-on: [self-hosted, Linux, X64]
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
@@ -60,7 +60,7 @@ jobs:
   docker-build:
     name: Build and Push Docker Image
     needs: test
-    runs-on: [self-hosted, Linux, X64]
+    runs-on: ubuntu-latest
     if: github.event_name == 'push' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v'))
     permissions:
       contents: read
@@ -107,7 +107,7 @@ jobs:
   build-package:
     name: Build Python Package
     needs: test
-    runs-on: [self-hosted, Linux, X64]
+    runs-on: ubuntu-latest
     if: startsWith(github.ref, 'refs/tags/v')
 
     steps:
@@ -152,7 +152,7 @@ jobs:
   release:
     name: Create GitHub Release
     needs: [test, build-package, docker-build]
-    runs-on: [self-hosted, Linux, X64]
+    runs-on: ubuntu-latest
     if: startsWith(github.ref, 'refs/tags/v')
     permissions:
       contents: write

.github/workflows/stale.yml

@@ -5,7 +5,7 @@ on:
 
 jobs:
   stale:
-    runs-on: [self-hosted, Linux, X64]
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/stale@v10
         with: