chore(deps): update package-lock.json and backend dependencies, adjust Dockerfile for leaner backend image

Removed unnecessary frontend dependencies from backend Docker image and updated package-lock.json to include new dev dependencies. Adjusted backend Dockerfile to streamline the build process and ensure proper workspace configuration.

backend/Dockerfile

@@ -5,10 +5,23 @@ RUN apt-get update \
   && apt-get install -y --no-install-recommends python3 make g++ \
   && rm -rf /var/lib/apt/lists/*
 WORKDIR /app
+# Do not set NODE_ENV=production here — npm would omit typescript needed for the build stage.
 COPY package.json package-lock.json ./
 COPY packages/contracts/package.json packages/contracts/
 COPY backend/package.json backend/
-RUN npm ci --workspace=@mmapp/contracts --workspace=mikrotik-manager-backend --include-workspace-root --ignore-scripts \
+# Drop root frontend deps (Next/React/UI) so backend image stays lean.
+RUN node -e "\
+  const fs=require('fs');\
+  const p=JSON.parse(fs.readFileSync('package.json','utf8'));\
+  p.dependencies={};\
+  p.devDependencies={};\
+  delete p.scripts;\
+  p.workspaces=['packages/*','backend'];\
+  fs.writeFileSync('package.json', JSON.stringify(p,null,2)+'\\n');\
+"
+# Prefer npm ci; if lockfile rejects stripped root package.json, fall back to install.
+RUN (npm ci --workspace=@mmapp/contracts --workspace=mikrotik-manager-backend --ignore-scripts \
+  || npm install --workspace=@mmapp/contracts --workspace=mikrotik-manager-backend --ignore-scripts) \
   && npm rebuild better-sqlite3
 
 FROM deps AS build