feat(docker): add encryption key generation for integration secrets (#1202)

* feat(docker): add encryption key generation for integration secrets

* chore: address pull request feedback

* fix: build failing

* fix: docker build fails because of error when encryption key not defined

scripts/generateEncryptionKey.js

@@ -0,0 +1,7 @@
+// This script generates a random encryption key
+// This key is used to encrypt and decrypt the integration secrets
+// In production it is generated in run.sh and stored in the environment variable ENCRYPTION_KEY
+// during runtime, it's also stored in a file.
+
+const crypto = require("crypto");
+console.log(crypto.randomBytes(32).toString("hex"));