fix: add ARG and ENV to Dockerfile for build args, fix typo in .env.staging

deploy/Dockerfile

@@ -1,6 +1,12 @@
 # Stage 1: Build with Node.js
 FROM node:20-alpine AS builder
 
+ARG VITE_DJANGO_BASE_URL
+ARG VITE_API_IMPLEMENTATION
+
+ENV VITE_DJANGO_BASE_URL=$VITE_DJANGO_BASE_URL
+ENV VITE_API_IMPLEMENTATION=$VITE_API_IMPLEMENTATION
+
 WORKDIR /app
 
 COPY package.json package-lock.json ./
@@ -13,7 +19,7 @@ RUN npm run build
 FROM nginx:alpine
 
 COPY --from=builder /app/dist /usr/share/nginx/html
-COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY deploy/nginx.conf /etc/nginx/conf.d/default.conf
 
 EXPOSE 80