Switch publishing/docs to Gitea container registry

Update CI and documentation to use git.easygoingaming.com image paths and document reqPackageAccess behavior in Pterodactyl when package visibility or pull auth is not configured.

.github/workflows/docker-publish.yml

@@ -1,4 +1,4 @@
-name: Build and Publish Docker Image
+name: Build and Publish Docker Image (Gitea Registry)
 
 on:
   push:
@@ -9,26 +9,23 @@ on:
 jobs:
   docker:
     runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Log in to GHCR
+      - name: Log in to Gitea Registry
         uses: docker/login-action@v3
         with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          registry: git.easygoingaming.com
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.GITEA_TOKEN }}
 
       - name: Extract metadata
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ghcr.io/${{ github.repository_owner }}/avorion-steamcmd-nsswrap
+          images: git.easygoingaming.com/davoguha/avorion-steamcmd-nsswrap
           tags: |
             type=raw,value=latest
             type=ref,event=tag