├── README.md
└── image-optimization
    ├── caching
        ├── Dockerfile5
        └── Dockerfile6
    ├── minimising-layers-count
        ├── Dockerfile3
        └── Dockerfile4
    └── multi-stage-builds
        ├── Dockerfile1
        ├── Dockerfile2
        ├── env
        ├── index.js
        └── package.json


/README.md:
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1 | # Docker Best Practices
2 | 
3 | This repo contians information about best pracrices and optmizations techniques for Docker images.
4 | 
5 | ## Documentations
6 | 
7 | 1. [How to Reduce Docker Image Size](https://devopscube.com/reduce-docker-image-size/)
8 | 


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/image-optimization/caching/Dockerfile5:
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1 | FROM ubuntu:latest
2 | ENV DEBIAN_FRONTEND=noninteractive
3 | RUN apt-get update -y
4 | RUN apt-get upgrade -y
5 | RUN apt-get install vim -y
6 | RUN apt-get install net-tools -y
7 | RUN apt-get install dnsutils -y
8 | COPY . .
9 | 


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/image-optimization/caching/Dockerfile6:
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1 | FROM ubuntu:latest
2 | COPY . .
3 | ENV DEBIAN_FRONTEND=noninteractive
4 | RUN apt-get update -y
5 | RUN apt-get upgrade -y
6 | RUN apt-get install vim -y
7 | RUN apt-get install net-tools -y
8 | RUN apt-get install dnsutils -y
9 | 


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/image-optimization/minimising-layers-count/Dockerfile3:
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1 | FROM ubuntu:latest
2 | ENV DEBIAN_FRONTEND=noninteractive
3 | RUN apt-get update -y
4 | RUN apt-get upgrade -y
5 | RUN apt-get install vim -y
6 | RUN apt-get install net-tools -y
7 | RUN apt-get install dnsutils -y
8 | 


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/image-optimization/minimising-layers-count/Dockerfile4:
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1 | FROM ubuntu:latest
2 | ENV DEBIAN_FRONTEND=noninteractive
3 | RUN apt-get update -y && \
4 |     apt-get upgrade -y && \
5 |     apt-get install --no-install-recommends vim net-tools dnsutils -y
6 | 


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/image-optimization/multi-stage-builds/Dockerfile1:
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1 | FROM node:16
2 | COPY . .
3 | RUN npm install
4 | 


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/image-optimization/multi-stage-builds/Dockerfile2:
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 1 | FROM node:16 as build
 2 | 
 3 | WORKDIR /app
 4 | COPY package.json index.js env ./
 5 | RUN npm install
 6 | 
 7 | FROM node:alpine as main
 8 | 
 9 | COPY --from=build /app /
10 | EXPOSE 8080
11 | CMD ["index.js"]
12 | 


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/image-optimization/multi-stage-builds/env:
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1 | PORT=3000
2 | 


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/image-optimization/multi-stage-builds/index.js:
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 1 | const dotenv=require('dotenv'); 
 2 | dotenv.config({ path: './env' });
 3 | 
 4 | dotenv.config();
 5 | 
 6 | const express=require("express");
 7 | const app=express();
 8 | 
 9 | app.get('/',(req,res)=>{
10 |   res.send(`Learning to Optimize Docker Images with DevOpsCube!`);
11 | });
12 | 
13 | 
14 | app.listen(process.env.PORT,(err)=>{
15 |     if(err){
16 |         console.log(`Error: ${err.message}`);
17 |     }else{
18 |         console.log(`Listening on port ${process.env.PORT}`);
19 |     }
20 |   }
21 | )
22 | 


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/image-optimization/multi-stage-builds/package.json:
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 1 | {
 2 |   "name": "nodejs",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1"
 8 |   },
 9 |   "keywords": [],
10 |   "author": "",
11 |   "license": "ISC",
12 |   "dependencies": {
13 |     "dotenv": "^10.0.0",
14 |     "express": "^4.17.2"
15 |   }
16 | }
17 | 


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