feat(prosody): Adjusts lua to use generational GC for brewery.cfg.lua.

prosody/rootfs/defaults/conf.d/brewery.cfg.lua

@@ -5,6 +5,30 @@
 {{ $JVB_XMPP_INTERNAL_MUC_DOMAIN := .Env.JVB_XMPP_INTERNAL_MUC_DOMAIN | default "muc.jvb.meet.jitsi" -}}
 {{ $JVB_AUTH_USER := .Env.JVB_AUTH_USER | default "jvb" -}}
 
+{{ $GC_TYPE := .Env.GC_TYPE | default "generational" -}}
+{{ $GC_INC_TH := .Env.GC_INC_TH | default 150 -}}
+{{ $GC_INC_SPEED := .Env.GC_INC_SPEED | default 250 -}}
+{{ $GC_INC_STEP_SIZE := .Env.GC_INC_STEP_SIZE | default 13 -}}
+{{ $GC_GEN_MIN_TH := .Env.GC_GEN_MIN_TH | default 20 -}}
+{{ $GC_GEN_MAX_TH := .Env.GC_GEN_MAX_TH | default 100 -}}
+
+--Prosody garbage collector settings
+--For more information see https://prosody.im/doc/advanced_gc
+{{ if eq $GC_TYPE "generational" }}
+gc = {
+    mode = "generational";
+    minor_threshold = {{ $GC_GEN_MIN_TH }};
+    major_threshold = {{ $GC_GEN_MAX_TH }};
+}
+{{ else }}
+gc = {
+	mode = "incremental";
+	threshold = {{ $GC_INC_TH }};
+	speed = {{ $GC_INC_SPEED }};
+	step_size = {{ $GC_INC_STEP_SIZE }};
+}
+{{ end }}
+
 admins = {
     "focus@{{ $JVB_XMPP_AUTH_DOMAIN }}",
     "{{ $JVB_AUTH_USER }}@{{ $JVB_XMPP_AUTH_DOMAIN }}"