(FFM-5131) Make proxy port configurable for docker container

Author: conormurray95

docker-compose.yml

@@ -20,6 +20,7 @@ services:
       - API_KEYS=${API_KEYS}
       - TARGET_POLL_DURATION=${TARGET_POLL_DURATION}
       - GENERATE_OFFLINE_CONFIG=${GENERATE_OFFLINE_CONFIG}
+      - PORT=${PORT}
     build:
       context: ./
       dockerfile: ./Dockerfile

docker-entrypoint.sh

@@ -31,4 +31,16 @@ if [ -v target ]; then
 	echo "* ${target},over_http" > /etc/pushpin/routes
 fi
 
+# Update routes file to use $PORT if set
+if [ -w /etc/pushpin/routes ]; then
+  if [ -n "${PORT}" ]; then
+    echo "Setting internal relay proxy port to ${PORT}"
+    sed -i \
+		-e "s/8000/${PORT}/g" \
+		/etc/pushpin/routes
+  fi
+else
+	echo "docker-entrypoint.sh: unable to write to /etc/pushpin/routes, readonly"
+fi
+
 exec "$@"

tests/e2e/testhelpers/setup/main.go

@@ -36,7 +36,8 @@ ORG_IDENTIFIER=%s
 ADMIN_SERVICE_TOKEN=%s
 API_KEYS=%s
 AUTH_SECRET=my_secret
-REDIS_ADDRESS=redis:6379`
+REDIS_ADDRESS=redis:6379
+PORT=9000`
 
 var generateOfflineConfigTemplate = `ACCOUNT_IDENTIFIER=%s
 ORG_IDENTIFIER=%s