pinned python version

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM gradle:8-jdk22 AS dind
+FROM maven:3-eclipse-temurin-21  AS dind
 
 ARG DEBIAN_FRONTEND=noninteractive
 ENV PIP_ROOT_USER_ACTION=ignore
@@ -16,8 +16,8 @@ RUN set -eux; \
     procps \
     supervisor
 
-COPY --from=docker:26-dind /usr/local/bin /usr/local/bin
-COPY --from=docker:26-dind /usr/local/libexec/docker/cli-plugins /usr/local/libexec/docker/cli-plugins
+COPY --from=docker:27-dind /usr/local/bin /usr/local/bin
+COPY --from=docker:27-dind /usr/local/libexec/docker/cli-plugins /usr/local/libexec/docker/cli-plugins
 
 COPY entrypoint.sh /usr/local/bin
 RUN chmod +x /usr/local/bin/entrypoint.sh
@@ -45,15 +45,9 @@ RUN apt-get update; \
 
 RUN rm -rf /usr/lib/python3*/EXTERNALLY-MANAGED
 
-RUN pip install \
-    flask \
-    Faker \
-    requests \
-    opentelemetry-api \
-    opentelemetry-sdk \
-    opentelemetry-exporter-prometheus \
-    opentelemetry-exporter-otlp \
-    opentelemetry-instrumentation-flask
+COPY requirements.txt /usr/local/src/requirements.txt
+
+RUN pip install -r /usr/local/src/requirements.txt
 
 WORKDIR /workspace
 

.devcontainer/devcontainer.json

@@ -1,7 +1,10 @@
 {
 	"name": "otel-getting-started",
 	"workspaceFolder": "/workspaces/opentelemetry-training/exercises",
-	"image": "ghcr.io/novatecconsulting/opentelemetry-training-application:update-gh-action-and-docker-env",
+	// "image": "ghcr.io/novatecconsulting/opentelemetry-training-application:latest",
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
 	"overrideCommand": false,
 	"runArgs": [
 		"--privileged"

.devcontainer/requirements.txt

@@ -0,0 +1,9 @@
+Faker==28.4.1
+Flask==3.0.3
+opentelemetry-api==1.27.0
+opentelemetry-exporter-otlp==1.27.0
+opentelemetry-exporter-prometheus==0.48b0
+opentelemetry-instrumentation-flask==0.48b0
+opentelemetry-sdk==1.27.0
+opentelemetry-semantic-conventions==0.48b0
+requests==2.32.3