build: pass env vars as build args to fix localhost:8000 error

- Add ARG and ENV directives to Dockerfile for NEXT_PUBLIC_* vars
- Pass build args in buildctl command with --opt build-arg
- Fixes ERR_BLOCKED_BY_CLIENT on localhost:8000/graphql

Dockerfile

@@ -1,17 +1,25 @@
-# Multi-stage build for Next.js
 FROM node:20-slim AS builder
 
 WORKDIR /app
 
-# Copy package files
+ARG NEXT_PUBLIC_SALEOR_API_URL
+ARG NEXT_PUBLIC_SITE_URL
+ARG NEXT_PUBLIC_OPENPANEL_CLIENT_ID
+ARG NEXT_PUBLIC_RYBBIT_HOST
+ARG NEXT_PUBLIC_RYBBIT_SITE_ID
+
+ENV NEXT_PUBLIC_SALEOR_API_URL=${NEXT_PUBLIC_SALEOR_API_URL}
+ENV NEXT_PUBLIC_SITE_URL=${NEXT_PUBLIC_SITE_URL}
+ENV NEXT_PUBLIC_OPENPANEL_CLIENT_ID=${NEXT_PUBLIC_OPENPANEL_CLIENT_ID}
+ENV NEXT_PUBLIC_RYBBIT_HOST=${NEXT_PUBLIC_RYBBIT_HOST}
+ENV NEXT_PUBLIC_RYBBIT_SITE_ID=${NEXT_PUBLIC_RYBBIT_SITE_ID}
+
 COPY package*.json ./
 RUN npm install --prefer-offline --no-audit
 
-# Copy source and build
 COPY . .
 RUN npm run build
 
-# Production stage
 FROM node:20-slim AS runner
 
 WORKDIR /app
@@ -20,7 +28,6 @@ ENV NODE_ENV=production
 ENV PORT=3000
 ENV HOSTNAME=0.0.0.0
 
-# Copy necessary files from builder
 COPY --from=builder /app/public ./public
 COPY --from=builder /app/.next/standalone ./
 COPY --from=builder /app/.next/static ./.next/static