chore(fork): drop private ee submodule and retarget CI to GHCR

Remove the private apps/server/src/ee git submodule (github.com/docmost/ee)
and the now-empty .gitmodules so that `git clone --recurse-submodules` and CI
checkout no longer fail with 404. The server loads EE only via guarded runtime
require(), so the build succeeds without it (community edition).

Rewrite .github/workflows/release.yml for the fork:
- drop the GitHub App token step and `submodules: recursive` checkout
- publish to GHCR (ghcr.io/vvzvlad/gitmost) via the built-in GITHUB_TOKEN
  instead of Docker Hub (docmost/docmost) — no extra secrets required
- add `packages: write` permission and an IMAGE env var
- log in as github.repository_owner; rename release tarballs to gitmost-*

Repoint the Dockerfile image source label to the fork.

.github/workflows/release.yml

@@ -12,9 +12,11 @@ on:
 
 permissions:
   contents: write
+  packages: write
 
 env:
   VERSION: ${{ inputs.version || github.ref_name }}
+  IMAGE: ghcr.io/vvzvlad/gitmost
 
 jobs:
   build:
@@ -29,28 +31,18 @@ jobs:
             suffix: arm64
     runs-on: ${{ matrix.runner }}
     steps:
-      - name: Generate token
-        id: app-token
-        uses: actions/create-github-app-token@v1
-        with:
-          app-id: ${{ secrets.BUILD_APP_ID }}
-          private-key: ${{ secrets.BUILD_APP_PRIVATE_KEY }}
-          owner: ${{ github.repository_owner }}
-
-      - name: Checkout with submodules
+      - name: Checkout
         uses: actions/checkout@v4
-        with:
-          submodules: recursive
-          token: ${{ steps.app-token.outputs.token }}
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Login to Docker Hub
+      - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push by digest
         id: build
@@ -58,7 +50,7 @@ jobs:
         with:
           context: .
           platforms: ${{ matrix.platform }}
-          outputs: type=image,name=docmost/docmost,push-by-digest=true,name-canonical=true,push=true
+          outputs: type=image,name=${{ env.IMAGE }},push-by-digest=true,name-canonical=true,push=true
           cache-from: type=gha,scope=${{ matrix.suffix }}
           cache-to: type=gha,scope=${{ matrix.suffix }},mode=max
 
@@ -78,7 +70,7 @@ jobs:
       - name: Strip v prefix
         id: strip-v
         run: echo "version=${VERSION#v}" >> "$GITHUB_OUTPUT"
-        
+
       - name: Export Docker image
         uses: docker/build-push-action@v6
         with:
@@ -86,19 +78,19 @@ jobs:
           platforms: ${{ matrix.platform }}
           push: false
           tags: |
-            docmost/docmost:latest
-            docmost/docmost:${{ steps.strip-v.outputs.version }}
-          outputs: type=docker,dest=docmost-${{ matrix.suffix }}.docker.tar
+            ${{ env.IMAGE }}:latest
+            ${{ env.IMAGE }}:${{ steps.strip-v.outputs.version }}
+          outputs: type=docker,dest=gitmost-${{ matrix.suffix }}.docker.tar
           cache-from: type=gha,scope=${{ matrix.suffix }}
 
       - name: Compress image
-        run: gzip docmost-${{ matrix.suffix }}.docker.tar
+        run: gzip gitmost-${{ matrix.suffix }}.docker.tar
 
       - name: Upload image archive
         uses: actions/upload-artifact@v4
         with:
           name: docker-image-${{ matrix.suffix }}
-          path: docmost-${{ matrix.suffix }}.docker.tar.gz
+          path: gitmost-${{ matrix.suffix }}.docker.tar.gz
           if-no-files-found: error
 
   release:
@@ -115,17 +107,18 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Login to Docker Hub
+      - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract metadata for tags
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: docmost/docmost
+          images: ${{ env.IMAGE }}
           tags: |
             type=semver,pattern={{version}},value=${{ env.VERSION }}
             type=semver,pattern={{major}}.{{minor}},value=${{ env.VERSION }},enable=${{ !contains(env.VERSION, '-') }}
@@ -135,7 +128,7 @@ jobs:
         working-directory: /tmp/digests
         run: |
           docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
-            $(printf 'docmost/docmost@sha256:%s ' *)
+            $(printf '${{ env.IMAGE }}@sha256:%s ' *)
 
       - name: Download image archives
         uses: actions/download-artifact@v4
@@ -149,6 +142,6 @@ jobs:
         with:
           tag_name: ${{ env.VERSION }}
           files: |
-            /tmp/images/docmost-amd64.docker.tar.gz
-            /tmp/images/docmost-arm64.docker.tar.gz
+            /tmp/images/gitmost-amd64.docker.tar.gz
+            /tmp/images/gitmost-arm64.docker.tar.gz
           draft: true