add starttls parcel script to package.json

.gitignore

@@ -6,6 +6,7 @@
 /gists/
 /src/simulation-scripts.js
 **/.DS_Store
+**/dev_cert
 .cache
 notes.txt
 env.js

package.json

@@ -11,6 +11,7 @@
     "scripts": {
         "test": "jest",
         "start": "parcel",
+        "starttls": "parcel --cert ./dev_cert/cert.pem --key ./dev_cert/key.pem",
         "build": "parcel build"
     },
     "dependencies": {