feat: add .NET auto-instrumentation script

deploy/docker/dotnet-instrumentation/docker-compose.dotnet.yml

@@ -0,0 +1,43 @@
+# Add this to your existing docker-compose.yml to enable .NET tracing
+# 
+# Usage:
+# 1. Add the otel-init service
+# 2. Add environment variables and volumes to your .NET app
+# 3. Set OTEL_SERVICE_NAME for each service
+
+services:
+  # Init container that provides OpenTelemetry .NET instrumentation
+  otel-init:
+    build: 
+      context: .
+      dockerfile: Dockerfile
+    volumes:
+      - otel-dotnet:/otel-dotnet
+    restart: "no"
+
+  # Example: Your .NET app with tracing enabled
+  # my-dotnet-app:
+  #   image: your-image:tag
+  #   depends_on:
+  #     otel-init:
+  #       condition: service_completed_successfully
+  #   environment:
+  #     # OpenTelemetry config
+  #     - OTEL_SERVICE_NAME=my-dotnet-app
+  #     - OTEL_EXPORTER_OTLP_ENDPOINT=http://ophion:8080
+  #     - OTEL_EXPORTER_OTLP_PROTOCOL=http/protobuf
+  #     - OTEL_TRACES_EXPORTER=otlp
+  #     - OTEL_METRICS_EXPORTER=otlp
+  #     - OTEL_LOGS_EXPORTER=otlp
+  #     # .NET CLR profiler config
+  #     - CORECLR_ENABLE_PROFILING=1
+  #     - CORECLR_PROFILER={918728DD-259F-4A6A-AC2B-B85E1B658571}
+  #     - CORECLR_PROFILER_PATH=/otel-dotnet/linux-x64/OpenTelemetry.AutoInstrumentation.Native.so
+  #     - DOTNET_ADDITIONAL_DEPS=/otel-dotnet/AdditionalDeps
+  #     - DOTNET_SHARED_STORE=/otel-dotnet/store
+  #     - DOTNET_STARTUP_HOOKS=/otel-dotnet/net/OpenTelemetry.AutoInstrumentation.StartupHook.dll
+  #   volumes:
+  #     - otel-dotnet:/otel-dotnet:ro
+
+volumes:
+  otel-dotnet: