Build a docker image that includes an embedded MariaDB server (#373)

This PR modifies the build process to generate two docker images; the
standard image, and one with MariaDB embedded into it for one click
installs.

This embedded MariaDB image is meant to support users on systems like
Unraid that don't easily support docker-compose.

Also; for users on Unraid, it will allow the creation of a single click
install template to be submitted to the Unraid marketplace (this will be
done at a later date after the release of 1.7.4).

.github/workflows/BuildDockerOnTag-Prerelease.yml

@@ -34,6 +34,12 @@ jobs:
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Login to GitHub Package Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push standard image
         uses: docker/build-push-action@v6
         with:
@@ -43,6 +49,7 @@ jobs:
           push: true
           tags: |
             gaseousgames/gaseousserver:${{ github.ref_name}}
+            ghcr.io/gaseous-project/gaseousserver:${{ github.ref_name}}
       - name: Build and push image with embedded mariadb
         uses: docker/build-push-action@v6
         with:
@@ -52,3 +59,4 @@ jobs:
           push: true
           tags: |
             gaseousgames/gaseousserver:${{ github.ref_name}}-embeddeddb
+            ghcr.io/gaseous-project/gaseousserver:${{ github.ref_name}}-embeddeddb

.github/workflows/BuildDockerOnTag-Release.yml

@@ -8,6 +8,11 @@ on:
 jobs:
   docker:
     runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+      attestations: write
+      id-token: write
     steps:
       - name: Checkout
         uses: actions/checkout@v4