Step 1: Set Up Project Directory\/Folder Create a directory for your project files.<\/p>\n\n\n\n
mkdir myapp\n cd myapp<\/code><\/pre>\n\n\n\n <\/p>\n\n\n\n
Step 2: Create Application (Example: Simple Node.js App) Create a server.js file for a basic web server. you can use vs code.<\/p>\n\n\n\n
\/\/ server.js\n const http = require('http');\n const port = 3000;\n http.createServer((req, res) => res.end('Hello from Docker!')).listen(port);<\/code><\/pre>\n\n\n\n <\/p>\n\n\n\n
Step 3: Create package.json This file manages dependencies for Node.js. Create it in the same directory as server.js.<\/p>\n\n\n\n
{\n \"name\": \"myapp\",\n \"version\": \"1.0.0\",\n \"main\": \"server.js\",\n \"scripts\": {\n \"start\": \"node server.js\"\n }\n }<\/code><\/pre>\n\n\n\n <\/p>\n\n\n\n
Step 4: Create Dockerfile In the same directory (all file create same folder), create a file called Dockerfile with the following contents:<\/p>\n\n\n\n
# Use the official Node.js base image\n\n FROM node:14 \n\n # Set the working directory inside the container \n\n WORKDIR \/usr\/src\/app\n\n # Copy package.json and install dependencies\n\n COPY package*.json .\/\n RUN npm install\n\n # Copy the rest of the application files\n\n COPY . . \n\n # Expose the app's port\n\n EXPOSE 3000\n\n # Run the app\n\n CMD [\"npm\", \"start\"]<\/code><\/pre>\n\n\n\n <\/p>\n\n\n\n
Step 5: Build Docker Image In your terminal (Command Prompt or Terminal or VS Code Terminal), run:<\/p>\n\n\n\n
docker build -t myapp .<\/code><\/pre>\n\n\n\n <\/p>\n\n\n\n
Step 6: Run the Docker Container Run the container using the following command:<\/p>\n\n\n\n
docker run -p 3000:3000 myapp<\/code><\/pre>\n\n\n\n <\/p>\n\n\n\n
Step 7: View the Result Open your browser and go to http:\/\/localhost:3000. You should see:<\/p>\n\n\n\n
Hello from Docker!<\/code><\/pre>\n\n\n\n <\/p>\n\n\n\n
<\/p>\n\n\n\n
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