fix(postgis): do not try to create postgis extension if it is already created or it is disabled

config/env.example.optional

@@ -207,3 +207,6 @@ COJO_JWT_RSA_PRIVATE_KEY=""
 COJO_JWT_ISS=""
 
 API_COJO_URL=""
+
+# Set to `disabled` if you want to diable postgis
+POSTGIS_EXTENSION_DISABLED=""

db/migrate/20230704093503_enable_postgis.rb

@@ -1,5 +1,7 @@
 class EnablePostgis < ActiveRecord::Migration[7.0]
   def change
-    enable_extension :postgis
+    if ENV['POSTGIS_EXTENSION_DISABLED'] != 'disabled' && ActiveRecord::Base.connection.execute("SELECT 1 as one FROM pg_extension WHERE extname = 'postgis';").count.zero?
+      enable_extension :postgis
+    end
   end
 end