Add more necessary gems, define versions, remove comments

Gemfile.lock

@@ -62,6 +62,7 @@ GEM
       zeitwerk (~> 2.3)
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
+    base32 (0.3.4)
     bcrypt (3.1.16)
     bindex (0.8.1)
     bootsnap (1.9.3)
@@ -120,13 +121,12 @@ GEM
     mini_portile2 (2.6.1)
     minitest (5.15.0)
     msgpack (1.4.2)
+    mysql2 (0.5.3)
     nio4r (2.5.8)
     nokogiri (1.12.5)
       mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
     public_suffix (4.0.6)
-    puma (5.5.2)
-      nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)
     rack-mini-profiler (2.3.3)
@@ -244,7 +244,8 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  bcrypt
+  base32
+  bcrypt (~> 3.1.7)
   bootsnap (>= 1.4.4)
   byebug
   capybara (>= 3.26)
@@ -252,7 +253,7 @@ DEPENDENCIES
   jbuilder (~> 2.7)
   listen (~> 3.3)
   midi-smtp-server (~> 3.0)
-  puma (~> 5.0)
+  mysql2 (>= 0.5)
   rack-mini-profiler (~> 2.0)
   rails (~> 6.1.4, >= 6.1.4.4)
   roo