Update Dockerfile for correct directory structure

Dockerfile

@@ -17,8 +17,11 @@ WORKDIR /app/web
 
 # Copy package files and install dependencies
 COPY web/package.json web/yarn.lock ./
+
+# Install ALL dependencies including dev dependencies needed for build
 RUN yarn install --frozen-lockfile --network-timeout 300000 && \
-    yarn add code-inspector-plugin
+    yarn add code-inspector-plugin autoprefixer postcss tailwindcss && \
+    yarn add --dev @types/node @types/react
 
 # Copy source and build
 COPY web/ .