fix(service): add instagram envs to postiz template (#6424)

templates/compose/postiz.yaml

@@ -67,7 +67,9 @@ services:
       - SLACK_SIGNING_SECRET=${SLACK_SIGNING_SECRET}
       - MASTODON_CLIENT_ID=${SERVICE_MASTODON_ID}
       - MASTODON_CLIENT_SECRET=${SERVICE_MASTODON_SECRET}
-
+      - INSTAGRAM_APP_ID=${INSTAGRAM_APP_ID}
+      - INSTAGRAM_APP_SECRET=${INSTAGRAM_APP_SECRET}
+      
       # Integration APIs
       - BEEHIIVE_API_KEY=${SERVICE_BEEHIIVE_KEY}
       - BEEHIIVE_PUBLICATION_ID=${SERVICE_BEEHIIVE_PUBID}