diff --git a/Dockerfile b/Dockerfile
index 5c333c3..f7b8922 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,15 @@ COPY package*.json ./
 RUN npm ci
 
 COPY . .
+
+# Next.js NEXT_PUBLIC_* vars must be present at build time
+ARG NEXT_PUBLIC_API_URL
+ARG NEXT_PUBLIC_POSTHOG_KEY
+ARG NEXT_PUBLIC_POSTHOG_HOST
+ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
+ENV NEXT_PUBLIC_POSTHOG_KEY=$NEXT_PUBLIC_POSTHOG_KEY
+ENV NEXT_PUBLIC_POSTHOG_HOST=$NEXT_PUBLIC_POSTHOG_HOST
+
 RUN npm run build
 
 # Production stage