make single captain file

backend/Dockerfile

-FROM node:22-alpine
-WORKDIR /app
-COPY package*.json ./
-RUN npm install --production
-COPY . .
-EXPOSE 5000
-CMD ["node", "src/app.js"]
\ No newline at end of file

captain-definition

 {
   "schemaVersion": 2,
-  "dockerfilePath": "backend/Dockerfile"
+  "dockerfileLines": [
+    "FROM node:22-alpine",
+    "WORKDIR /app",
+    "COPY . .",
+    "RUN cd backend && npm install --production",
+    "EXPOSE 5000",
+    "CMD [\"sh\", \"-c\", \"cd backend && node src/app.js\"]"
+  ]
 }
\ No newline at end of file

frontend/Dockerfile

-FROM node:22-alpine AS build-step
-WORKDIR /app
-COPY package*.json ./
-RUN npm install
-COPY . .
-RUN npm run build
-
-FROM socialengine/nginx-spa:latest
-COPY --from=build-step /app/dist /app
-RUN chmod -R 777 /app
\ No newline at end of file