Complete setup for docker. Add readme, and fix some bugs

frontend/Dockerfile

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+# Stage 0: Get base system
+FROM node:20-alpine AS base
+
+
+# Stage 1: Instal dependencies 
+FROM base AS dependencies
+WORKDIR /application
+COPY package*.json ./
+RUN npm ci
+
+
+# Stage 2: Build
+FROM base AS builder
+WORKDIR /application
+COPY --from=dependencies /application/node_modules ./node_modules
+COPY . .
+ENV NEXT_TELEMETRY_DISABLED 1
+RUN npm run build
+
+
+# Stage 3: Start
+FROM base AS runner
+WORKDIR /application
+ENV NODE_ENV production
+ENV NEXT_TELEMETRY_DISABLED 1
+
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+COPY --from=builder /application/public ./public
+
+RUN mkdir .next
+RUN chown nextjs:nodejs .next
+COPY --from=builder --chown=nextjs:nodejs /application/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /application/.next/static ./.next/static
+
+USER nextjs
+
+EXPOSE 3000
+ENV PORT 3000
+
+CMD HOSTNAME="0.0.0.0" node server.js