Merge branch 'chore/build-sh-pod-create'

Instead of erroring when the owpengram pod is absent, build.sh now creates it
with the MTProto (2398), admin (2600), extra TCP (2400) and RTC/UDP port
mappings.

build.sh

@@ -29,9 +29,14 @@ if [ "${NO_DEPLOY:-0}" = "1" ]; then
 fi
 
 if ! podman pod exists "$POD"; then
-  echo "error: pod '$POD' does not exist - create it first, e.g.:" >&2
-  echo "  podman pod create --name $POD -p 127.0.0.1:2401:2401" >&2
-  exit 1
+  echo "pod '$POD' does not exist - creating it"
+  podman pod create --name "$POD" \
+    -p 2398:2398 \
+    -p 127.0.0.1:2600:2600 \
+    -p 2400:2400 \
+    -p 12399:12399/udp \
+    -p 12400:12400/udp \
+    -p 12500-12999:12500-12999/udp
 fi
 if [ ! -f .env ]; then
   echo "error: .env not found (containers are created with --env-file .env)" >&2