fix(config): remove unsupported inline comments from .env.example, an…

…d format

dotenv does not actually support inline comments, so these comments were
being parsed incorrectly as part of the environment variable values.

Upstream issue: motdotla/dotenv#484

This also groups and sorts the environment variables for readability,
and removes the quotes around values.

(Quotes should probably only be used around values with significant
spaces, to avoid confusion.)

.env.example

@@ -1,26 +1,31 @@
-AUTH0_DOMAIN= # Required
-AUTH0_AUDIENCE="http://localhost:3000" # Required
-AUTH0_CLIENT_ID="someClientId"
-AUTH0_CLIENT_SECRET="someClientSecret"
-AUTH0_API_KEY="someapikey" # Required
+# App config
+PORT=3000
+#HOST=localhost
+HTTP_LOG_LEVEL=debug
+MONGO_URI=mongodb://localhost:27017/registree-core
 
-ADMIN_API_KEY="someapikey" # Required
+# Storage
+# True to store uploads locally, if not set S3 details is required
+LOCAL_OBJECT_STORAGE=true
+#S3_ENDPOINT=someS3Endpont.example.com
+#S3_ACCESS_KEY_ID=someS3AccessKey
+#S3_SECRET=someS3Secret
 
-PORT=3000 # Optional
+# Auth config
+AUTH0_DOMAIN=
+AUTH0_CLIENT_ID=someClientId
+AUTH0_CLIENT_SECRET=someClientSecret
+AUTH0_AUDIENCE=http://localhost:3000
+AUTH0_MANAGEMENT_API=https://link.to/auth0/management/api
+AUTH0_CONNECTION=Connection-Name
+AUTH0_API_KEY=someapikey
+ADMIN_API_KEY=someapikey
+# Set NODE_ENV to "develop" to ignore JWT expiration.
+NODE_ENV=develop
 
-LOCAL_OBJECT_STORAGE="true" # True to store uploads locally, if not set S3 details is required
-# S3_ENDPOINT="someS3Endpont.example.com"
-# S3_ACCESS_KEY_ID="someS3AccessKey"
-# S3_SECRET="someS3Secret"
-HTTP_LOG_LEVEL="debug"
-NODE_ENV="develop"
-
-CUSTOMER_API="http://someapi.com" # Required
-QUERY_API="http://query-api.example.com" # Required
-STUDENT_API="http://student-api.example.com" # required
-LINKING_API="http://linking-api.example.com"
-IDENTIFYING_API="http://identifying-api.example.com"
-MONGO_URI="mongodb://localhost:27017/registree-core"
-
-AUTH0_MANAGEMENT_API="https://link.to/auth0/management/api"
-AUTH0_CONNECTION="Connection-Name"
+# API config
+CUSTOMER_API=http://someapi.com
+QUERY_API=http://query-api.example.com
+STUDENT_API=http://student-api.example.com
+LINKING_API=http://linking-api.example.com
+IDENTIFYING_API=http://identifying-api.example.com