added dockerfile and updated captain file

Dockerfile

@@ -0,0 +1,21 @@
+FROM node:16-alpine
+
+# Set working directory
+
+ENV NODE_ENV=production
+# Copy package.json and package-lock.json (if available)
+COPY package*.json ./
+
+
+# Copy the built application files
+
+
+COPY ./public ./public
+
+COPY ./node_modules ./node_modules
+# Expose the desired port (e.g., 3000)
+
+EXPOSE 3000
+
+# Start the Node.js server
+CMD ["npm", "run", "start"]

captain-definition-frontend

@@ -1,10 +1,4 @@
- {
-  "schemaVersion": 2,
-  "dockerfileLines": [
-                        "FROM node:16-alpine",
-                        "WORKDIR /usr/app",
-                        "COPY . /usr/src/app",
-                        "RUN npm install",
-                        "CMD [ \"npm\", \"start\" ]"
-                    ]
- }
+{
+    "schemaVersion": 2,
+    "dockerfilePath": "./Dockerfile"
+}