feat(lago-rails): make Puma concurrency and thread config optional

Add conditional environment variables for WEB_CONCURRENCY,
RAILS_MAX_THREADS, and RAILS_MIN_THREADS in the deployment template
so they are only set when explicitly configured. Remove the hardcoded
default of 4 for concurrency in values.yaml, allowing Puma to use its
own defaults when no value is provided.

Author: IxDay

charts/lago-rails/templates/deployment.yaml

@@ -63,6 +63,18 @@ spec:
               value: {{ .Values.config.web.sidekiq | quote }}
             - name: LAGO_DISABLE_SIGNUP
               value: {{ not .Values.global.lago.signup | quote }}
+            {{- with .Values.config.web.concurrency }}
+            - name: WEB_CONCURRENCY
+              value: {{ . }}
+            {{- end }}
+            {{- with .Values.config.web.maxThreads }}
+            - name: RAILS_MAX_THREADS
+              value: {{ . }}
+            {{- end }}
+            {{- with .Values.config.web.minThreads }}
+            - name: RAILS_MIN_THREADS
+              value: {{ . }}
+            {{- end }}
             - name: DATABASE_URL
               valueFrom:
                 secretKeyRef:

charts/lago-rails/values.yaml

@@ -149,7 +149,7 @@ config:
   web:
     maxThreads:
     minThreads:
-    concurrency: 4
+    concurrency:
     sidekiq: false
 
   sidekiq: