add example for the pyflink intro blog post (#35)

* add example for the pyflink intro blog post

* update READMEs

* update to multi-arch container image

README.md

@@ -52,6 +52,7 @@ _Decodable provides a managed PyFlink service. Learn more [here](https://docs.de
 | [PyFlink](pyflink)                                              | Running a basic PyFlink job on Kubernetes                                               |
 | [PyFlink on Decodable](pyflink-decodable)                       | Running a PyFlink job as a Custom Pipeline on Decodable                                 |
 | [PyFlink and MongoDB Vector Search](pyflink-vector-embeddings)  | End-to-end example for PyFlink Vector Ingestion on Decodable with MongoDB Vector Search |
+| [PyFlink Intro](pyflink-intro)                                  | A Hands-On Introduction to PyFlink                                                      |
 
 ### Integrations
 

pyflink-intro/.devcontainer/Containerfile

@@ -0,0 +1,17 @@
+FROM mcr.microsoft.com/devcontainers/python:1-3.11-bullseye
+
+RUN apt-get update && apt-get install -y curl zip unzip && rm -rf /var/lib/apt/lists/*
+
+USER 1000:1000
+WORKDIR /home/vscode
+
+RUN curl -s "https://get.sdkman.io" | bash
+SHELL ["/bin/bash", "-c"]
+RUN source "/home/vscode/.sdkman/bin/sdkman-init.sh" \
+        && sdk install java 17.0.14-tem \
+        && sdk flush
+
+RUN export JAVA_HOME=/home/vscode/.sdkman/candidates/java/current \
+        && pip install apache-flink==1.20.0
+
+RUN pip install sentence-transformers==3.4.0 langchain-community==0.3.16 langchain-huggingface==0.1.2 langchain-text-splitters==0.3.5

pyflink-intro/.devcontainer/compose.dev.yaml

@@ -0,0 +1,10 @@
+name: pyflink-intro
+services:
+  pyflink-app-dev:
+    hostname: pyflink-app-dev
+    image: hpgrahsl/pyflink-app-dev:1.1
+    volumes:
+      - ./:/home/vscode/workspaces/:cached
+    command: sleep infinity
+    networks:
+      - demo-network

pyflink-intro/.devcontainer/devcontainer.json

@@ -0,0 +1,16 @@
+{
+	"name": "pyflink-app-dev",
+    "dockerComposeFile": [
+        "../compose.yaml",
+        "./compose.dev.yaml"
+    ],
+    "service": "pyflink-app-dev",
+    "shutdownAction": "stopCompose",
+    "workspaceFolder": "/home/vscode/workspaces/",
+    "containerEnv": {
+		"JAVA_HOME": "/home/vscode/.sdkman/candidates/java/current"
+	},
+	"remoteEnv": {
+		"PATH":"${containerEnv:PATH}:${containerEnv:JAVA_HOME}/bin"
+	}
+}