feat: new configuration system (and schema) (#2819)

Gemfile.lock

@@ -102,9 +102,6 @@ GEM
     deep_merge (1.2.2)
     diff-lcs (1.5.0)
     dotenv (3.0.2)
-    dotenv-rails (3.0.2)
-      dotenv (= 3.0.2)
-      railties (>= 6.1)
     dynamic_form (1.3.1)
       actionview (> 5.2.0)
       activemodel (> 5.2.0)
@@ -151,6 +148,8 @@ GEM
       concurrent-ruby (>= 1.0, < 2.0)
       json
       rouge (>= 3.30, < 5.0)
+    konfig-config (2.1.1)
+      hashie
     loofah (2.22.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
@@ -335,7 +334,7 @@ DEPENDENCIES
   chronic
   coffee-rails (~> 5.0)
   database_cleaner
-  dotenv-rails
+  dotenv
   dynamic_form
   encrypto_signo
   execjs (~> 2.7, < 2.8)
@@ -347,6 +346,7 @@ DEPENDENCIES
   jquery-rails
   kaminari
   klogger-logger
+  konfig-config (~> 2.0)
   mail
   moonrope
   mysql2