nginx update for tftp (#73)

## Description


Slow clients, which are very common for firmware iPXE, will fail with this timeout. Also, updated all DNS names to be fully qualified. Bump the stack chart version in prep for a new release.

## Why is this needed



Fixes: #

## How Has This Been Tested?





## How are existing users impacted? What migration steps/scripts do we need?





## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

tinkerbell/stack/Chart.yaml

@@ -15,13 +15,13 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.4.1
+version: 0.4.2
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
 # It is recommended to use it with quotes.
-appVersion: "0.4.1"
+appVersion: "0.4.2"
 
 dependencies:
   - name: tink

tinkerbell/stack/templates/nginx-configmap.yaml

@@ -21,7 +21,7 @@ data:
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
           resolver $POD_NAMESERVER;
-          set $smee_dns {{ .Values.smee.name }}.{{ .Release.Namespace }}.svc.cluster.local; # needed in Kubernetes for dynamic DNS resolution
+          set $smee_dns {{ .Values.smee.name }}.{{ .Release.Namespace }}.svc.cluster.local.; # needed in Kubernetes for dynamic DNS resolution
 
           proxy_pass http://$smee_dns:{{ .Values.smee.http.port }};
         }
@@ -55,6 +55,8 @@ data:
        server {
         listen {{ .Values.stack.hook.port }};
         location / {
+          sendfile           on;
+          sendfile_max_chunk 1m;
           root /usr/share/nginx/html;
         }
       }
@@ -66,15 +68,14 @@ data:
       server {
           listen {{ .Values.smee.tftp.port }} udp;
           resolver $POD_NAMESERVER;
-          set $smee_dns {{ .Values.smee.name }}.{{ .Release.Namespace }}.svc.cluster.local; # needed in Kubernetes for dynamic DNS resolution
+          set $smee_dns {{ .Values.smee.name }}.{{ .Release.Namespace }}.svc.cluster.local.; # needed in Kubernetes for dynamic DNS resolution
           proxy_pass $smee_dns:{{ .Values.smee.tftp.port }};
-          proxy_timeout 1s;
           access_log /dev/stdout logger-json;
       }
       server {
           listen {{ .Values.smee.syslog.port }} udp;
           resolver $POD_NAMESERVER;
-          set $smee_dns {{ .Values.smee.name }}.{{ .Release.Namespace }}.svc.cluster.local; # needed in Kubernetes for dynamic DNS resolution
+          set $smee_dns {{ .Values.smee.name }}.{{ .Release.Namespace }}.svc.cluster.local.; # needed in Kubernetes for dynamic DNS resolution
           proxy_pass $smee_dns:{{ .Values.smee.syslog.port }};
           access_log /dev/stdout logger-json;
       }