Add outbound HTTP proxy example override

docker-compose/examples/outbound-http-proxy/docker-compose.override.yaml

@@ -0,0 +1,65 @@
+# Docker Compose override file for routing outbound HTTP(S) traffic through an HTTP proxy
+# ex. telemetry, update checks, and license verification to services.sourcegraph.com,
+# and connections to code hosts, auth providers, and LLM providers outside your private network
+# See https://sourcegraph.com/docs/self-hosted/private-network#http-proxy-configuration
+
+
+# Reusable block of environment variables, for services which initiate outbound connections
+x-proxy-env-vars: &proxy-env-vars
+
+  HTTP_PROXY: http://proxy.example.com:8080
+  HTTPS_PROXY: http://proxy.example.com:8080
+
+  # Skip the proxy for local traffic
+  # Add your internal code hosts, auth providers, image registries, etc. which are reachable without the proxy
+  # If a container fails its health check after adding the proxy, also add the Docker network's CIDR range, ex. 172.16.0.0/12
+  # Each line needs a trailing comma, as YAML folds these lines into one line, separated by spaces
+  NO_PROXY: >-
+    blobstore,
+    caddy,
+    cadvisor,
+    codeinsights-db,
+    codeinsights-db-exporter,
+    codeintel-db,
+    codeintel-db-exporter,
+    gitserver-0,
+    grafana,
+    migrator,
+    node-exporter,
+    otel-collector,
+    pgsql,
+    pgsql-exporter,
+    precise-code-intel-worker,
+    prometheus,
+    redis-cache,
+    redis-store,
+    searcher-0,
+    sourcegraph-frontend-0,
+    sourcegraph-frontend-internal,
+    syntactic-code-intel-worker,
+    syntect-server,
+    worker,
+    zoekt-indexserver-0,
+    zoekt-webserver-0,
+    localhost,
+    127.0.0.1
+
+
+services:
+
+  sourcegraph-frontend-0:
+    environment:
+      <<: *proxy-env-vars
+
+  sourcegraph-frontend-internal:
+    environment:
+      <<: *proxy-env-vars
+
+  # Uncomment if connections to code hosts outside your private network need to use the proxy
+  # gitserver-0:
+  #   environment:
+  #     <<: *proxy-env-vars
+
+  worker:
+    environment:
+      <<: *proxy-env-vars