diff --git a/Dockerfile b/Dockerfile
index de52500..3101cb5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,9 @@ WORKDIR /app
 FROM base AS deps
 WORKDIR /temp-deps
 COPY package*.json ./
-RUN npm ci --ignore-scripts --no-fund --no-audit
+# Force dev deps even when the deploy platform sets NODE_ENV=production at build time
+ENV NODE_ENV=development
+RUN npm ci --include=dev --ignore-scripts --no-fund --no-audit
 
 # Stage 3: Production dependencies only
 FROM base AS prod-deps
@@ -29,6 +31,7 @@ RUN npm ci --omit=dev --ignore-scripts --no-fund --no-audit
 # Stage 4: Build
 FROM base AS builder
 WORKDIR /build
+ENV NODE_ENV=development
 COPY package*.json ./
 COPY --from=deps /temp-deps/node_modules ./node_modules
 COPY . .