Inject secret key at build time

functions/package-lock.json

@@ -3382,11 +3382,6 @@
         "is-stream": "^1.0.1"
       }
     },
-    "node-forge": {
-      "version": "0.7.6",
-      "resolved": "https://registry.npmjs.org/node-forge/-/node-forge-0.7.6.tgz",
-      "integrity": "sha512-sol30LUpz1jQFBjOKwbjxijiE3b6pjd74YwfD0fJOKPjF+fONKb2Yg8rYgS6+bK6VDl+/wfr4IYpC7jDzLUIfw=="
-    },
     "nth-check": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-1.0.2.tgz",

functions/package.json

@@ -30,7 +30,6 @@
     "lru-cache": "^5.1.1",
     "mime": "^2.4.0",
     "ndjson": "^1.5.0",
-    "node-forge": "^0.7.6",
     "pretty-bytes": "^5.1.0",
     "prop-types": "^15.6.2",
     "react": "^16.7.0",