add aiohttp example

Author: andreaturli

examples/aiohttp/Dockerfile

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+FROM python:3.13-slim
+
+WORKDIR /app
+
+COPY . /app
+
+RUN pip install aiohttp elastic-opentelemetry
+
+# Install all the instrumentations available for the installed packages
+RUN edot-bootstrap -a install
+
+EXPOSE 8080
+
+# Set some resource attributes to make our service recognizable
+ENV OTEL_RESOURCE_ATTRIBUTES="service.name=AioHttpService,service.version=0.0.1,deployment.environment=development"
+
+CMD ["opentelemetry-instrument", "python", "app.py"]

examples/aiohttp/README.md

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+# Aiohttp autoinstrumented application
+
+This is a barebone aiohttp app used for demonstrating autoinstrumentation with EDOT.
+
+You can build the application image it with:
+
+```
+docker build --load -t edot-aiohttp:latest .
+```
+
+You can run the application with:
+
+```sh
+export OTEL_METRICS_EXPORTER=otlp
+export OTEL_LOGS_EXPORTER=otlp
+export OTEL_EXPORTER_OTLP_ENDPOINT=https://my-deployment.apm.us-west1.gcp.cloud.es.io
+export OTEL_EXPORTER_OTLP_HEADERS="Authorization=Bearer P....l"
+docker run -e OTEL_EXPORTER_OTLP_ENDPOINT="$OTEL_EXPORTER_OTLP_ENDPOINT" \
+  -e OTEL_EXPORTER_OTLP_HEADERS="$OTEL_EXPORTER_OTLP_HEADERS" \
+  -p 8080:8080 -it --rm edot-aiohttp:latest
+```
+
+You can access the application from [http://127.0.0.1:8080](http://127.0.0.1:8080).

examples/aiohttp/app.py

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+# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+# or more contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import logging
+from aiohttp import web
+
+
+logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")
+logger = logging.getLogger(__name__)
+
+routes = web.RouteTableDef()
+
+
+@routes.get("/")
+async def hello(request):
+    logger.info("Hello, world")
+    return web.Response(text="Hello, world")
+
+
+app = web.Application()
+app.add_routes(routes)
+web.run_app(app)