fix(runner): set render PORT

https://render.com/docs/web-services#port-binding
Render default port for new service is 10000 and at startup they detect
any app running on another port and switch the primary port to it.
However the switch triggers a restart to reconfigure the network
which is problematic for us since the runner has already registered as
RUNNING and is being potentially sent task
This commit set the PORT explicitely in order to avoid the automatic
detection and restart

packages/jobs/lib/runner/render.ts

@@ -33,6 +33,7 @@ export const renderNodeProvider: NodeProvider = {
                     plan: getPlan(node)
                 },
                 envVars: [
+                    { key: 'PORT', value: '80' },
                     { key: 'NODE_ENV', value: envs.NODE_ENV },
                     { key: 'NANGO_CLOUD', value: String(envs.NANGO_CLOUD) },
                     { key: 'NODE_OPTIONS', value: `--max-old-space-size=${Math.floor((node.memoryMb / 4) * 3)}` },