Fix build errors: add typed params, use client tags, and Docker build args

Dockerfile

@@ -18,7 +18,13 @@ COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 
 # Environment variables must be present at build time for Next.js
-# Coolify will provide these, but we can set defaults
+ARG NEXT_PUBLIC_CLOUDINARY_CLOUD_NAME
+ARG CLOUDINARY_API_KEY
+ARG CLOUDINARY_API_SECRET
+
+ENV NEXT_PUBLIC_CLOUDINARY_CLOUD_NAME=$NEXT_PUBLIC_CLOUDINARY_CLOUD_NAME
+ENV CLOUDINARY_API_KEY=$CLOUDINARY_API_KEY
+ENV CLOUDINARY_API_SECRET=$CLOUDINARY_API_SECRET
 ENV NEXT_TELEMETRY_DISABLED=1
 
 RUN npm run build