Merge pull request #69 from awanlin/topic/update-plantuml

Updated PlantUML to 2024.6

Author: awanlin

Dockerfile

@@ -17,7 +17,7 @@ FROM python:3.12-alpine
 RUN apk update && apk --no-cache add gcc musl-dev openjdk17-jdk curl graphviz ttf-dejavu fontconfig
 
 # Download plantuml file, Validate checksum & Move plantuml file
-RUN curl -o plantuml.jar -L https://github.com/plantuml/plantuml/releases/download/v1.2023.10/plantuml-1.2023.10.jar && echo "527d28af080ae91a455e7023e1a726c7714dc98e plantuml.jar" | sha1sum -c - && mv plantuml.jar /opt/plantuml.jar
+RUN curl -o plantuml.jar -L https://github.com/plantuml/plantuml/releases/download/v1.2024.6/plantuml-1.2024.6.jar && echo "3e944755cbed59e1ed9332691d92294bef7bbcda  plantuml.jar" | sha1sum -c - && mv plantuml.jar /opt/plantuml.jar
 
 RUN pip install --upgrade pip && pip install mkdocs-techdocs-core==1.3.5
 

README.md

@@ -31,3 +31,11 @@ Then open up `http://localhost:8000` on your local machine.
 The release flow is managed by a [GitHub actions workflow](.github/workflows/release-tag.yml). Whenever a new [release](https://github.com/backstage/techdocs-container/releases) is published on GitHub, the workflow pushes the tag to [DockerHub](https://hub.docker.com/r/spotify/techdocs).
 
 Note: The `latest` tag on DockerHub points to the recent commits in the `main` branch. This is configured by the [main workflow](.github/workflows/main.yml). We recommend using a specific version of the container instead of `latest` release for stability and avoiding unexpected changes.
+
+## Updating PlantUML
+
+PlantUML is a Java based tool which is packaged in a single JAR file. You can find the latest released in their [GitHub repo under Releases](https://github.com/plantuml/plantuml/releases). When updating the Docker file with a new release of PlantUML you'll need to download the relevant JAR file first and then generate a checksum using `sha1sum`. Here are the steps:
+
+1. Download the JAR file: `curl -o plantuml.jar -L https://github.com/plantuml/plantuml/releases/download/v1.2024.6/plantuml-1.2024.6.jar`
+2. Generate the checksum: `sha1sum plantuml.jar`
+3. Update the Dockerfile file with the proper release URL and checksum