ci: use --network=host and localhost for @cal/shared install

Docker build containers can't resolve 'server' hostname.
Use --network=host with localhost:3000 instead.

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

.gitea/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
 
       - name: Build and push image
         run: |
-          docker build -t ${{ env.IMAGE }}:${{ env.IMAGE_TAG }} -t ${{ env.IMAGE }}:latest .
+          docker build --network=host -t ${{ env.IMAGE }}:${{ env.IMAGE_TAG }} -t ${{ env.IMAGE }}:latest .
           echo "${{ secrets.REGISTRY_TOKEN }}" | docker login ${{ env.REGISTRY }} -u ${{ secrets.REGISTRY_USER }} --password-stdin
           docker push ${{ env.IMAGE }}:${{ env.IMAGE_TAG }}
           docker push ${{ env.IMAGE }}:latest

Dockerfile

@@ -7,7 +7,7 @@ WORKDIR /app
 COPY package.json package-lock.json* ./
 
 # Replace Gitea public URL with internal for CI builds
-RUN sed -i 's|https://gitea.jeffemmett.com|http://server:3000|g' package.json
+RUN sed -i 's|https://gitea.jeffemmett.com|http://localhost:3000|g' package.json
 
 # Install dependencies
 RUN npm install