add images

Author: cevheri

README.md

@@ -1,17 +1,63 @@
 # Spring Boot Overriding Environment Variables Guide
-This is an example of overriding the application.yml file with the OS environment variables. `Single` or `Array` environment variables can be overridden.
+
+
+This is an example of overriding the application.yml file with the OS environment variables. 
+`Single` or `Array` environment variables can be overridden.
+
+![img.png](images/title.png)
+
+We talk about many ways to override environment variables in a Spring Boot application. Not auto-configuration :(
+
+---
+
+## Understanding Environment Variables
+* Your Spring Boot application has a `application.yml` or `application.properties` file.
+* The application properties are converted to environment variables when you run the Spring Boot application.
+* The environment variables are key-value pairs that are set in the operating system.
+* They are used to configure applications and services.
+* Many ways to override environment variables in a Spring Boot application.
+
+---
 
 ## Overview
 1. This guide will show you how to override environment variables in a Spring Boot application.
-2. Single and multiple environment variables will be overridden.
+2. Single and array environment variables will be overridden.
 3. When you run a Spring Boot application, the application properties are converted to environment variables.
 4. You can override environment variables using the `-D` flag when java -jar is used.
 5. You can override environment variables using the `-e` flag when running a Spring Boot application in a Docker container.
 6. You can override environment variables using ConfigMaps and Secrets when running a Spring Boot application in a Kubernetes cluster.
 7. You can override environment variables using the `application.yml` file from git repository with spring cloud config server.
+
+----
+
+## Prerequisites
+* JDK 17
+* Maven 3.9x
+* Spring Boot 3x
+
 ---
 
-## Our Use Case
+## Getting Started
+* Clone the repository
+```shell
+git clone https://github.com/cevheri/spring-boot-overriding-environment-variables.git
+```
+
+* Change directory
+```shell
+cd spring-boot-overriding-environment-variables
+```
+
+* Run the Spring Boot application
+```shell
+mvn spring-boot:run
+```
+
+---
+
+
+## Our Use Cases
+![img.png](images/uses-cases.png)
 4 and 5 are the most common use cases for overriding environment variables in a Spring Boot application. Maybe next time we can talk about the Kubernetes and Spring Cloud Config Server use cases.
 
 ---
@@ -75,25 +121,46 @@ Run the Spring Boot application using the `java -jar` command.
 ```shell
 java -jar target/soe.jar
 ```
-
+![default-values.png](images/default-values.png)
 ---
 
 #### Override Environment Variables
 ```shell
 java -jar '-Dapp-properties.name=overridden-name-cevheri' '-Dapp-roles[0]=overridden-role-0-cevheri' '-Dapp-paths[0].roles[4]=overridden-path-0-role-0-cevheri' target/soe.jar
 ```
+![overrided-values.png](images/overrided-values.png)
+---
+
 ### Docker
 #### Simple
 ```shell
 docker run -p 8080:8080 soe:latest
 ```
-
+![docker-default-values.png](images/docker-default-values.png)
 #### Override Environment Variables
 ```shell
 docker run -p 8080:8080 -e APP_PROPERTIES_NAME=overridden-name-cevheri-docker -e APP_ROLES_0=overridden-role-0-cevheri-docker -e APP_PATHS_0_ROLES_4=overridden-path-0-role-0-cevheri-docker soe:latest
 ```
+![docker-overrided-values.png](images/docker-overrided-values.png)
 
 
+## Test
+
+```shell
+mvn test
+```
+
+---
+
+## Conclusion
+* This guide showed you how to override environment variables in a Spring Boot application. 
+* Single and multiple(array) environment variables were overridden. 
+* When you run a Spring Boot application, the application properties are converted to environment variables. 
+* You can override environment variables using the `-D` flag when java -jar is used. 
+* You can override environment variables using the `-e` flag when running a Spring Boot application in a Docker container.
+
+---
+
 ### Reference Documentation
 
 For further reference, please consider the following sections:

images/docker-default-values.png

@@ -0,0 +1,40 @@
+import requests
+
+# Create a new token in https://medium.com/me/settings/ > security and app > integration tokens
+# get userId in https://api.medium.com/v1/me
+# curl -H "Authorization: Bearer TOKEN" -H "Content-Type: application/json" -H "Accept: application/json" https://api.medium.com/v1/me | jq '.data.id'
+# copy the id
+
+
+MEDIUM_USER_ID = "USER_ID"
+MEDIUM_API_URL = f"https://api.medium.com/v1/users/{MEDIUM_USER_ID}/posts"
+MEDIUM_TOKEN = "TOKEN"
+TITLE = "NLP Sentiment Analysis on Restaurant Reviews"
+FILE_NAME = "nlp-sentiment-analysis-restaurant.md"
+
+
+def main():
+    headers = {
+        "Authorization": f"Bearer {MEDIUM_TOKEN}",
+        "Content-Type": "application/json",
+        "Accept": "application/json",
+        "Accept-Charset": "utf-8"
+    }
+
+    data = {
+        "title": TITLE,
+        "contentFormat": "markdown",
+        "content": open(FILE_NAME, "r").read()
+    }
+
+    response = requests.post(MEDIUM_API_URL, headers=headers, json=data)
+
+    if response.status_code == 201:
+        print("Article published successfully!")
+    else:
+        print(f"Error: {response.status_code}")
+        print(f"Error content: {response.content}")
+
+
+if __name__ == "__main__":
+    main()