Fix JWT setup for Heroku deployment

Issue is that JWT keys cannot be store on the filesystem.
Proposal is to read them from ENV.

api/.env

@@ -25,9 +25,9 @@ CORS_ALLOW_ORIGIN=^https?://localhost(:[0-9]+)?$
 VARNISH_URL=http://cache-proxy
 
 ###> lexik/jwt-authentication-bundle ###
-JWT_SECRET_KEY=%kernel.project_dir%/config/jwt/private.pem
-JWT_PUBLIC_KEY=%kernel.project_dir%/config/jwt/public.pem
-JWT_PASSPHRASE=e9503436f63f37f6381616b3e8080536
+# JWT_PRIVATE_KEY=$(cat %kernel.project_dir%/config/jwt/private.pem | base64 | tr -d '\n')
+# JWT_PUBLIC_KEY=$(cat %kernel.project_dir%/config/jwt/public.pem | base64 | tr -d '\n')
+# JWT_PASSPHRASE=!ChangeMe!
 ###< lexik/jwt-authentication-bundle ###
 
 ###> symfony/swiftmailer-bundle ###

api/config/packages/lexik_jwt_authentication.yaml

@@ -1,4 +1,4 @@
 lexik_jwt_authentication:
-    secret_key: '%env(resolve:JWT_SECRET_KEY)%'
-    public_key: '%env(resolve:JWT_PUBLIC_KEY)%'
+    secret_key: '%env(base64:JWT_PRIVATE_KEY)%'
+    public_key: '%env(base64:JWT_PUBLIC_KEY)%'
     pass_phrase: '%env(JWT_PASSPHRASE)%'