fix: gitea workflows, docker-compose.yml y Dockerfile

Dockerfile

@@ -1,50 +1,27 @@
 # ─── Stage 1: Builder ───────────────────────────────────────────────────────
-FROM node:20-alpine AS builder
-RUN apk add --no-cache libc6-compat
+FROM node:20-alpine AS deps
 WORKDIR /app
-
 COPY package.json package-lock.json ./
+RUN apk add --no-cache libc6-compat
 RUN npm ci && npm cache clean --force
 
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
 COPY . .
-
-ARG NEXT_PUBLIC_SUPABASE_URL
-ARG NEXT_PUBLIC_SUPABASE_ANON_KEY
-ENV NEXT_PUBLIC_SUPABASE_URL=$NEXT_PUBLIC_SUPABASE_URL
-ENV NEXT_PUBLIC_SUPABASE_ANON_KEY=$NEXT_PUBLIC_SUPABASE_ANON_KEY
-
+# Next.js compila aquí (esta es la parte que consume RAM)
 RUN npm run build
 
 # ─── Stage 2: Production Runner ────────────────────────────────────────────
-FROM node:20-alpine AS runner
+FROM node:18-alpine AS runner
 WORKDIR /app
-
-ENV NODE_ENV=production
+ENV NODE_ENV production
 ENV PORT=3020
-ENV HOSTNAME=0.0.0.0
 
-RUN addgroup --system --gid 1001 nodejs && \
-    adduser --system --uid 1001 nextjs
-
-# Copy full standalone output (may be flat or contain a subdir)
-COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
-
-# Ensure server.js exists at /app/server.js (create symlink if nested)
-RUN if [ ! -f /app/server.js ]; then \
-        SERVER_PATH=$(find /app -maxdepth 2 -name server.js | head -1) && \
-        if [ -n "$SERVER_PATH" ]; then \
-            ln -s "$SERVER_PATH" /app/server.js && \
-            echo "Symlinked server.js: $SERVER_PATH -> /app/server.js"; \
-        else \
-            echo "ERROR: server.js not found" && exit 1; \
-        fi; \
-    fi
-
-# Copy static assets
-COPY --from=builder --chown=nextjs:nodejs /app/public ./public
-COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
-
-USER nextjs
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/package.json ./package.json
 
 EXPOSE 3020