feat: Update Dockerfile for Node 20 and add vite-env.d.ts for environment variables

Dockerfile

@@ -1,9 +1,10 @@
-FROM node:18-alpine AS build
+FROM node:20-alpine AS build
 WORKDIR /app
-ENV NODE_ENV=production
 
-# Install dependencies
+# Install dependencies (include devDependencies for the build)
 COPY package*.json ./
+# Ensure devDependencies are installed during the build
+ENV NODE_ENV=development
 RUN npm ci --silent
 
 # Copy source and build
@@ -11,6 +12,8 @@ COPY . .
 RUN npm run build
 
 FROM nginx:stable-alpine AS production
+WORKDIR /usr/share/nginx/html
+# Copy built files from the build stage
 COPY --from=build /app/dist /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 EXPOSE 80 443