fix: correct CI/CD workflow issues

- Fix lint.yml to use 'yarn check' instead of 'yarn lint' (ESLint not configured)
- Fix Dockerfile to use 'yarn install --production' for single package repo
- Update workflow name to reflect actual functionality

.github/workflows/lint.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   typescript-lint:
-    name: TypeScript & ESLint
+    name: TypeScript Type Check
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -38,4 +38,4 @@ jobs:
         run: yarn install --frozen-lockfile
 
       - name: Type check
-        run: yarn lint
+        run: yarn check

Dockerfile

@@ -36,7 +36,7 @@ WORKDIR /app
 COPY .yarnrc.yml package.json yarn.lock ./
 
 # Install production dependencies (uses PnP)
-RUN yarn workspaces focus --production
+RUN yarn install --immutable --production
 
 # Copy PnP files and built application from builder stage
 COPY --from=builder --chown=nextjs:nodejs /app/.pnp.cjs /app/.pnp.loader.mjs ./