Remove Alpine 3.16 from most versions (max 2 supported Alpine versions at a time), fix ordering

Author: tianon

3.1/alpine3.16/Dockerfile

@@ -29,8 +29,7 @@
       "buster",
       "slim-buster",
       "alpine3.18",
-      "alpine3.17",
-      "alpine3.16"
+      "alpine3.17"
     ],
     "version": "3.1.4"
   },
@@ -74,8 +73,7 @@
       "buster",
       "slim-buster",
       "alpine3.18",
-      "alpine3.17",
-      "alpine3.16"
+      "alpine3.17"
     ],
     "version": "3.2.2"
   }

3.2/alpine3.16/Dockerfile

@@ -78,13 +78,11 @@ for version in "${versions[@]}"; do
 					# Alpine 3.17+ defaults to OpenSSL 3 which is not supported (yet?) by Ruby 2.7 or 3.0
 					# https://bugs.ruby-lang.org/issues/18658
 					# https://github.com/docker-library/ruby/pull/392#issuecomment-1329896174
-					if [ "2.7", "3.0" ] | index(env.version) then empty else
-						"3.17",
+					if [ "2.7", "3.0" ] | index(env.version) then "3.16" else
 						"3.18",
+						"3.17",
 						empty # trailing comma hack
-					end,
-					"3.16",
-					empty # trailing comma hack
+					end
 				| "alpine" + .)
 			],
 		}