fix(docker): resolve @cc-platform/server file: dep in container build

Use additional_contexts to copy platform server package into the Docker
build context. Rewrites the file: dependency path and removes the
lockfile so npm install can resolve the local package correctly.

web/docker-compose.yml

@@ -1,6 +1,9 @@
 services:
   server:
-    build: ./server
+    build:
+      context: ./server
+      additional_contexts:
+        platform-server: ../../cc-platform-core/server
     networks:
       - inventory-network
     volumes:

web/server/Dockerfile

@@ -8,8 +8,16 @@ RUN apk add --no-cache python3 make g++ su-exec libstdc++
 
 WORKDIR /app
 
+# Copy platform server package from additional build context
+COPY --from=platform-server . /app/platform-server/
+RUN rm -rf /app/platform-server/node_modules
+
 COPY package*.json ./
 
+# Rewrite file: dependency to use the local copy inside the container
+RUN sed -i 's|file:../../../cc-platform-core/server|file:./platform-server|' package.json \
+    && rm -f package-lock.json
+
 RUN npm install --omit=dev
 
 # Remove build tools after install to keep image small