build(docker): remove bash from web image

nix/wordle-solver-web-docker.nix

@@ -6,7 +6,6 @@ let
     nginx,
     runCommand,
     wordle-solver-web,
-    writeShellScriptBin,
     ...
   }:
     dockerTools.buildImage {
@@ -21,10 +20,6 @@ let
               "nogroup:x:65534:"
             ];
           })
-          (writeShellScriptBin "start" ''
-            echo "Start serving worlde-solver at port 80..."
-            /bin/nginx -c /etc/nginx.conf
-          '')
           (runCommand "nginx-conf" {} ''
             mkdir -p $out/etc
 
@@ -47,13 +42,13 @@ let
             EOF
           '')
         ];
-        pathsToLink = ["/bin" "/etc"];
+        pathsToLink = ["/etc"];
       };
       runAsRoot = ''
         mkdir -p /var/log/nginx
       '';
       config = {
-        Cmd = ["/bin/start"];
+        Cmd = ["${nginx}/bin/nginx" "-c" "/etc/nginx.conf"];
       };
     };
 in {