add zero-downtime deployments & update nginx versions

well it's not quite zero-downtime because it seems that for a while the
old task has stopped but has not yet been removed from traefik, so for a
few seconds half the requests get back "bad gateway"

5 files changed, 35 insertions, 7 deletions

diff --git a/jobs/faeltkullen.nomad.hcl b/jobs/faeltkullen.nomad.hcl
index a5065fe..422346b 100644
--- a/jobs/faeltkullen.nomad.hcl
+++ b/jobs/faeltkullen.nomad.hcl
@@ -6,6 +6,12 @@ job "faeltkullen" {
       }
     }
 
+    update {
+      canary       = 1
+      auto_revert  = true
+      auto_promote = true
+    }
+
     volume "files" {
       type      = "host"
       source    = "static-files"
@@ -38,7 +44,7 @@ job "faeltkullen" {
       }
 
       config {
-        image = "nginx:1.25-alpine"
+        image = "nginx:1.29-alpine"
         ports = ["http"]
 
         volumes = [
diff --git a/jobs/files.nomad.hcl b/jobs/files.nomad.hcl
index 2bb2b00..3d8227d 100644
--- a/jobs/files.nomad.hcl
+++ b/jobs/files.nomad.hcl
@@ -6,6 +6,12 @@ job "files" {
       }
     }
 
+    update {
+      canary       = 1
+      auto_revert  = true
+      auto_promote = true
+    }
+
     volume "files" {
       type      = "host"
       source    = "static-files"
@@ -38,7 +44,7 @@ job "files" {
       }
 
       config {
-        image = "nginx:1.25-alpine"
+        image = "nginx:1.29-alpine"
         ports = ["http"]
 
         volumes = [
diff --git a/jobs/homepage/homepage.nomad.hcl b/jobs/homepage/homepage.nomad.hcl
index dc1be71..f859314 100644
--- a/jobs/homepage/homepage.nomad.hcl
+++ b/jobs/homepage/homepage.nomad.hcl
@@ -1,13 +1,17 @@
 job "homepage" {
   group "web" {
-    count = 1
-
     network {
       port "http" {
         to = 80
       }
     }
 
+    update {
+      canary       = 1
+      auto_revert  = true
+      auto_promote = true
+    }
+
     service {
       name     = "homepage"
       port     = "http"
@@ -29,7 +33,7 @@ job "homepage" {
       }
 
       config {
-        image = "nginx:1.25-alpine"
+        image = "nginx:1.29-alpine"
         ports = ["http"]
 
         volumes = [
diff --git a/jobs/raytracer.nomad.hcl b/jobs/raytracer.nomad.hcl
index 4a528e5..2578b35 100644
--- a/jobs/raytracer.nomad.hcl
+++ b/jobs/raytracer.nomad.hcl
@@ -6,6 +6,12 @@ job "raytracer" {
       }
     }
 
+    update {
+      canary       = 1
+      auto_revert  = true
+      auto_promote = true
+    }
+
     volume "files" {
       type      = "host"
       source    = "static-files"
@@ -38,7 +44,7 @@ job "raytracer" {
       }
 
       config {
-        image = "nginx:1.25-alpine"
+        image = "nginx:1.29-alpine"
         ports = ["http"]
 
         volumes = [
diff --git a/jobs/rr.nomad.hcl b/jobs/rr.nomad.hcl
index 9c00e3b..0517103 100644
--- a/jobs/rr.nomad.hcl
+++ b/jobs/rr.nomad.hcl
@@ -6,6 +6,12 @@ job "rr" {
       }
     }
 
+    update {
+      canary       = 1
+      auto_revert  = true
+      auto_promote = true
+    }
+
     volume "files" {
       type      = "host"
       source    = "static-files"
@@ -38,7 +44,7 @@ job "rr" {
       }
 
       config {
-        image = "nginx:1.25-alpine"
+        image = "nginx:1.29-alpine"
         ports = ["http"]
 
         volumes = [