Update Dockerfile for correct directory structure

Dockerfile

@@ -12,8 +12,9 @@ ENV NODE_OPTIONS="--max_old_space_size=2048"
 ENV NEXT_TELEMETRY_DISABLED=1
 ENV NODE_ENV=production
 
-# Install only production dependencies
-RUN yarn install --production --frozen-lockfile --network-timeout 300000
+# Install ALL dependencies (including dev dependencies) needed for build
+RUN yarn install --frozen-lockfile --network-timeout 300000 && \
+    yarn add code-inspector-plugin
 
 # Copy web source files
 COPY web/ .