Server/school: add dns record and caddy reverse proxy

This container is for hosting things that I need for school
I don't trust my code to be secure yet, so that's why it's in a
container

flake.lock

@@ -613,6 +613,18 @@
         "type": "github"
       }
     },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 0,
+        "narHash": "sha256-Tbk1MZbtV2s5aG+iM99U8FqwxU/YNArMcWAv6clcsBc=",
+        "path": "/nix/store/l9nb64iii15y0nr37qrs1cfm6rlpg6gh-source",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
     "nur": {
       "inputs": {
         "flake-parts": "flake-parts",
@@ -700,17 +712,18 @@
         "nixpkgs-unstable-raw": "nixpkgs-unstable-raw",
         "nur": "nur",
         "plasma-manager": "plasma-manager",
-        "secrets": "secrets"
+        "secrets": "secrets",
+        "shows-api": "shows-api"
       }
     },
     "secrets": {
       "flake": false,
       "locked": {
-        "lastModified": 1736417093,
+        "lastModified": 1737970846,
-        "narHash": "sha256-3MRzAQaYpggkWuhZBofBjDQm02NGhUk1K4LJhf9z4k0=",
+        "narHash": "sha256-+b44nvv+rKiRdABSHGaTLbp9ysRaHE+s/CuUsA9zNac=",
         "ref": "refs/heads/main",
-        "rev": "48d048bb2089631e758072561d95b4b7d1130178",
+        "rev": "d8262fb108d0810d21c5e098b54a105e867e72ce",
-        "revCount": 27,
+        "revCount": 28,
         "type": "git",
         "url": "ssh://forgejo@git.everest.tailscale:4222/Toast/nix-secrets"
       },
@@ -719,6 +732,25 @@
         "url": "ssh://forgejo@git.everest.tailscale:4222/Toast/nix-secrets"
       }
     },
+    "shows-api": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_3",
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1737914989,
+        "narHash": "sha256-9rOs5bFZ3BQb3SgGn0dF3fCdVQZ0Zdr9nj2LhO+t5uc=",
+        "ref": "refs/heads/main",
+        "rev": "be97a926ce75b9fbe278e4ba519e9273c238316c",
+        "revCount": 13,
+        "type": "git",
+        "url": "ssh://forgejo@git.everest.tailscale:4222/Toast/shows-api.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "ssh://forgejo@git.everest.tailscale:4222/Toast/shows-api.git"
+      }
+    },
     "systems": {
       "locked": {
         "lastModified": 1681028828,
@@ -779,6 +811,21 @@
         "type": "github"
       }
     },
+    "systems_5": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
     "treefmt-nix": {
       "inputs": {
         "nixpkgs": [
@@ -799,6 +846,24 @@
         "repo": "treefmt-nix",
         "type": "github"
       }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems_5"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -88,6 +88,8 @@
       url = "github:catppuccin/konsole";
       flake = false;
     };
+
+    shows-api.url = "git+ssh://forgejo@git.everest.tailscale:4222/Toast/shows-api.git";
   };
 
   outputs = {...} @ inputs:

roles/server/default.nix

@@ -19,5 +19,6 @@
     ./prometheus.nix
     ./changedetection-io.nix
     ./immich.nix
+    ./school.nix
   ];
 }

roles/server/immich.nix

@@ -21,4 +21,5 @@
       reverse_proxy localhost:2283
     '';
   };
+  programs.rust-motd.settings.service_status."Immich" = "immich-server";
 }

roles/server/school.nix

@@ -0,0 +1,138 @@
+{
+  flakeSelf,
+  config,
+  ...
+}: let
+  hostSecrets = "${flakeSelf.inputs.secrets}/" + config.networking.hostName + "/";
+in {
+  networking.nat = {
+    enable = true;
+    internalInterfaces = ["ve-+"];
+    externalInterface = "eno1";
+  };
+
+  age.secrets.mongodb-uri = {
+    file = hostSecrets + "mongodb-uri.age";
+  };
+
+  containers.school = {
+    autoStart = true;
+    privateNetwork = true;
+    ephemeral = true;
+    hostAddress = "192.168.100.10";
+    localAddress = "192.168.100.11";
+    specialArgs = {
+      showsApi = flakeSelf.inputs.shows-api;
+    };
+    bindMounts = {
+      secret = {
+        mountPoint = "/mongodb.env";
+        isReadOnly = true;
+        hostPath = config.age.secrets.mongodb-uri.path;
+      };
+    };
+    config = {
+      config,
+      pkgs,
+      lib,
+      showsApi,
+      ...
+    }: {
+      environment.systemPackages = [pkgs.htop];
+
+      users.users.shows = {
+        name = "shows";
+        group = "shows";
+        isSystemUser = true;
+      };
+      users.groups.shows = {};
+
+      systemd.services = let
+        commonServiceConfig = {
+          Type = "simple";
+          Restart = "on-failure";
+          RestartSec = 3;
+
+          # Hardening
+          CapabilityBoundingSet = "";
+          NoNewPrivileges = true;
+          PrivateUsers = true;
+          PrivateTmp = true;
+          PrivateDevices = true;
+          PrivateMounts = true;
+          ProtectClock = true;
+          ProtectControlGroups = true;
+          ProtectHome = true;
+          ProtectHostname = true;
+          ProtectKernelLogs = true;
+          ProtectKernelModules = true;
+          ProtectKernelTunables = true;
+          RestrictAddressFamilies = [
+            "AF_INET"
+            "AF_INET6"
+            "AF_UNIX"
+          ];
+          RestrictNamespaces = true;
+          RestrictRealtime = true;
+          RestrictSUIDSGID = true;
+        };
+      in {
+        shows-api = {
+          description = "NestJS API to store info about shows on a MongoDB database";
+          after = ["network.target"];
+          wantedBy = ["multi-user.target"];
+          serviceConfig =
+            commonServiceConfig
+            // {
+              ExecStart = lib.getExe showsApi.packages.x86_64-linux.default;
+              StateDirectory = ["shows-api"];
+              RuntimeDirectory = ["shows-api"];
+              User = "shows";
+              Group = "shows";
+              EnvironmentFile = "/mongodb.env";
+            };
+        };
+      };
+
+      networking = {
+        firewall.allowedTCPPorts = [3000];
+
+        # Use systemd-resolved inside the container
+        # Workaround for bug https://github.com/NixOS/nixpkgs/issues/162686
+        useHostResolvConf = lib.mkForce false;
+      };
+
+      services.resolved.enable = true;
+
+      system.stateVersion = "24.11";
+    };
+  };
+  services = {
+    headscale.settings.dns.extra_records = [
+      {
+        name = "shows.everest.tailscale";
+        type = "A";
+        value = "100.100.0.1";
+      }
+    ];
+    caddy.virtualHosts.shows= {
+      hostName = "shows.everest.tailscale";
+      extraConfig = ''
+        import tailscale
+        handle {
+         respond "Ionic app goes here"
+        }
+
+        redir /admin /admin/
+        handle_path /admin/* {
+          respond "Angular admin panel goes here"
+        }
+
+        redir /api /api/
+        handle_path /api/* {
+          reverse_proxy ${config.containers.school.localAddress}:3000
+        }
+      '';
+    };
+  };
+}