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ii:labs:s2:04:tasks:03 [2023/05/18 17:00] radu.ciobanu |
ii:labs:s2:04:tasks:03 [2024/04/11 13:09] (current) radu.ciobanu [03. [30p] Writing a Dockerfile] |
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| - | ==== 03. [10p] Testing for data persistence ==== | + | ==== 03. [30p] Writing a Dockerfile ==== |
| == Subtasks == | == Subtasks == | ||
| - | - stop and delete the three containers started at exercise 1 | + | - go to the //**node_app**// folder from the {{:ii:labs:s2:04:lab4_docker.zip|lab archive}}, which contains the source files for a simple NodeJS application |
| - | - start them again using the same commands given at exercise 1 | + | - write a Dockerfile that will be used to create an image by following the steps below: |
| - | - send a //**POST**// request using Postman and verify that the book you added at exercise 2 is still in the library | + | - start **//from//** the latest version of the official NodeJS image, **//node:21-alpine3.18//** |
| + | - **//copy//** the file **//package.json//** from the local host to the current directory in the new image (./); this file is intended to specify the dependencies of the NodeJS application (for example, the Express.js framework) | ||
| + | - **//run//** the command **//npm install//** to install the dependencies in the file from the previous step | ||
| + | - **//copy//** the source file **//server.js//** to the working directory **///usr/src/app/ //** | ||
| + | - **//expose//** port 8080 | ||
| + | - set the **//command//** to run the application; you will run the **//node//** binary to execute the **///usr/src/app/server.js//** file | ||
| + | - use the previously written Dockerfile to create an image called **//mynodeimage//** | ||
| + | - start a container running image **//mynodeimage//** on port 12345 in detached (daemon) mode | ||
| + | - verify that your application works correctly by going to [[http://localhost:12345]] (you should see a "Hello World" text) | ||
